Patent Publication Number: US-8111587-B2

Title: Watch with calendar mechanism equipped with month indicator and date indicator

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a watch with a calendar mechanism equipped with a month indicator and a date indicator. In particular, the present invention relates to a watch with a calendar mechanism which indicates month by a month indicator arranged on the inner side of the watch and which indicates date by a date indicator arranged on the outer side of the month indicator so that there is no need to correct the indication of the date indicator at the end of a month except for February. 
     2. Description of the Related Art 
     Generally speaking, a machine body inclusive of a driving portion of a watch is referred to as a “movement.” A watch completed by mounting a dial and hands to a movement and putting the whole into a watch case is referred to as a “complete.” Of both sides of a main plate forming the base plate of the watch, the side on which the glass of the watch case exists, that is, the side on which the dial exists, is referred to as the “back side” or the “glass side” or the “dial side” of the movement. Of both sides of the main plate, the side on which the case back of the watch case exists, that is, the side opposite to the dial, is referred to as the “front side” or the “case back side” of the movement. A train wheel assembled to the “front side” of the movement is referred to as the “front train wheel.” A train wheel assembled to the “back side” of the movement is referred to the “back train wheel.” 
     Generally speaking, in an analog watch, a “12 o&#39;clock side” refers to the side of the dial where the mark corresponding to 12 o&#39;clock is arranged. In an analog watch, a “12 o&#39;clock direction” refers to the direction from the rotation center of the hand toward the “12 o&#39;clock” side. In an analog watch, a “3 o&#39;clock side” refers to the side of the dial where the mark corresponding to 3 o&#39;clock is arranged. In an analog watch, a “3 o&#39;clock direction” refers to the direction from the rotation center of the hand toward the “3 o&#39;clock side.” In an analog watch, a “6 o&#39;clock side” refers to the side of the dial where the mark corresponding to 6 o&#39;clock is arranged. In an analog watch, a “6 o&#39;clock direction” refers to the direction from the rotation center of the hand toward the “6 o&#39;clock side.” In an analog watch, a “9 o&#39;clock side” refers to the side of the dial where the mark corresponding to 9 o&#39;clock is arranged. In an analog watch, a “9 o&#39;clock direction” refers to the direction from the rotation center of the hand toward the “9 o&#39;clock side.” Further, in some cases, a side of the dial on which some other mark is arranged is referred to, as in the case of a “2 o&#39;clock direction” and a “2 o&#39;clock side.” 
     In a first type of conventional watch with a calendar mechanism, a 1st date recess for detecting the first date of a date plate and a 30th date recess for detecting the 30th date of the date plate are formed at the same level in the inner periphery of the date plate with respect to the rotation axis direction of a date indicator driving wheel. A date feeding finger and a month feeding finger are provided on the date indicator driving wheel. A 1st day is detected by a 1st day detecting portion of a 1st day detecting lever, and a month feeding finger is controlled by a month feeding regulating portion of a month feeding control device, with no month feeding effected except for the 1st date. When the 1st date is attained, the month plate is fed by the month feeding finger. In the case of a longer month, a shorter month detecting lever regulates the date feeding finger such that the date plate is fed only one day by the date feeding finger. In the case of a shorter month, the shorter month detecting lever can rotate counterclockwise, making it possible to successively feed two teeth of the date plate by the date feeding finger. Only when a 30th date detecting lever is engaged with the 30th date recess to thereby detect the 30th date, and the shorter month detecting lever simultaneously detects a shorter month, are two teeth of the date plate fed by the date feeding finger (See, for example, Japanese Patent No. 2651150). 
     In a second type of conventional watch with a calendar mechanism, a tooth portion coming into contact with the date feeding finger, the 30th date recess for detecting the 30th date of the date plate, and the 1st date recess for detecting the 1st date of the date plate are formed stepwise at different levels in the inner periphery of the date plate with respect to the rotation axis direction of the date indicator driving wheel (See, for example, Patent Document JP-A-2005-195370). 
     In a third type of conventional watch with a calendar mechanism, a cutout is provided in a date indicating member, and, only when the date indicating member is at a specific position, is month indication effected by the cutout (See, for example, Patent Document JP-A-54-73667). 
     A fourth type of conventional watch with a calendar mechanism is equipped with a date driving wheel set, and a year indicator has 24 teeth, which is double the number of months in a year; an intermediate wheel has a first wheel in mesh with the year indicator and a second wheel fixed in position so as to be coaxial with the first wheel, with the second wheel being in mesh with a protrusion arranged on the inner side of a second stage of a date ring at the end of each month (See, for example, Patent Document JP-A-2006-162611). 
     In the first type of conventional watch with a calendar mechanism, the 1st date recess of the date plate and the 30th date recess of the date plate are formed at the same level, so that the 30th date detecting portion detects both recesses of the date plate, resulting in a rather unstable operation of the calendar mechanism. Further, in this structure, the three control levers, that is, the 1st date detecting lever, the shorter month detecting lever, and the 30th date detecting lever are arranged between the date plate and the month plate, so that the structure of the calendar mechanism is rather complicated, and it is rather difficult to reduce the size of the watch. 
     In the second type of conventional watch with a calendar mechanism, the 30th date recess of the date plate to be engaged with the 30th date detecting lever and the 1st date recess of the date plate to be engaged with the 1st date detecting lever are formed at different levels in the thickness direction of the movement, so that the thickness of the date plate increases, resulting in an increase in the thickness of the movement. 
     In the third type of conventional watch with a calendar mechanism, the month indication is effected through the cutout of the date indicating member, so that the month indication is rather small and hard to see. Further, in this structure, the month indication can only be seen on a specific day. 
     In the fourth type of conventional watch with a calendar mechanism, the structure of the date driving wheel set is rather complicated, and it is rather difficult to attain a reduction in the size and thickness of the watch. Further, in this structure, the month indication is rather small and hard to see. 
     SUMMARY OF THE INVENTION 
     It is an aspect of the present invention to provide a watch with a calendar mechanism in which the date feeding mechanism and the month feeding mechanism are formed thin and small, making it possible to form the movement in a small thickness. 
     It is another aspect of the present invention to provide a watch with a calendar mechanism in which the structure of the date feeding mechanism and the month feeding mechanism is simple and which is stable in its operation. 
     It is another aspect of the present invention to provide a watch with an automatic calendar mechanism in which the month indication is large and easy to see and in which there is no need to correct the indication of the date indicator at the end of each month except for February. 
     According to the present invention, there is provided a watch with a calendar mechanism equipped with a month indicator and a date indicator, the watch comprising: 
     a date indicator indicating date; 
     a month indicator rotating based on rotation of the date indicator to indicate month; 
     a date indicator driving wheel formed so as to make one rotation per 24 hours; 
     a date feeding finger formed to be capable of causing the date indicator to rotate based on the rotation of the date indicator driving wheel; and 
     a shorter month end feeding lever formed so as to be capable of rotating the date indicator based on the rotation of the date indicator driving wheel and the rotation of the month indicator, 
     characterized in that the date indicator includes a date indicating surface portion provided with a date letter, a date indicator tooth portion coming into contact with a date feeding portion of the date feeding finger, and a month end tooth for feeding the date indicator at the end of each month, 
     the month indicator includes a month indicating surface portion provided with a month letter, and a month cam for operating a shorter month end feeding lever at the end of a shorter month, 
     the month end tooth of the date indicator is arranged so as to be capable of coming into contact with the shorter month end feeding lever when the date letter indicates a month end, and 
     the shorter month end feeding lever is formed so as to be capable of feeding the date indicator by one day based on the rotation of the date indicator driving wheel and the month cam at the end of a shorter month, 
     the watch further comprising a month feeding lever formed so as to be capable of moving based on the rotation of the date indicator to rotate the month indicator, with the month feeding lever being formed so as to be capable of feeding the month indicator at the end of a month. 
     Due to this construction, it is possible to realize a watch with a calendar mechanism whose movement has a small thickness. Due to this construction, it is possible to realize a watch with a calendar mechanism in which the operation of the date feeding mechanism and the month feeding mechanism is stable. Further, due to this construction, no excessive load is applied to the transmission train wheel at the time of usual date feeding. 
     In the watch with a calendar mechanism of the present invention, it is desirable that the month feeding lever be formed so as to move toward the month indicator based on the rotation of the date indicator and to be restored to its former position by the resilient force of a spring portion of the month feeding lever. Due to this construction, it is possible to realize a watch with a calendar mechanism in which the operation of the date feeding mechanism and the month feeding mechanism is stable. 
     In the watch with a calendar mechanism of the present invention, it is desirable that the shorter month end feeding lever include a month end feeding finger for feeding the date indicator at the end of a shorter month, the month end tooth being provided for the purpose of detecting a time when the date indicator indicates a “30th day”, the month end tooth being provided on an inner side wall portion of the date indicator, the month end tooth of the date indicator being arranged so as to be capable of coming into contact with the shorter month end feeding finger when the date letter indicates the end of a month. Due to this construction, it is possible to realize a watch with a calendar mechanism in which the operation of the date feeding mechanism and the month feeding mechanism is stable. 
     In the watch with a calendar mechanism of the present invention, it is desirable that the shorter month end feeding lever be arranged on the upper side of the date feeding finger, and be formed so as to be movable with respect to the rotation center of the date indicator driving wheel. Due to this construction, it is possible to realize a watch with a calendar mechanism whose movement has a small thickness. 
     In the watch with a calendar mechanism of the present invention, it is desirable that the month end tooth be arranged on the inner side of the date indicating surface portion on the side nearer to the date indicator tooth portion than to the date indicating surface portion. Due to this construction, it is possible to realize a watch with a calendar mechanism whose movement has a small thickness. 
     In the watch with a calendar mechanism of the present invention, it is desirable that the date indicator driving wheel have a lever driving pin, the shorter month end feeding lever being rotated by the lever driving pin and movable with respect to the month end tooth based on the rotation of the month indicator. In the watch with a calendar mechanism of the present invention, it is desirable that the shorter month end feeding lever be formed as a single plate. In the watch with a calendar mechanism of the present invention, it is desirable that the month end tooth be provided solely at one position of the date indicator, and be formed so as to be capable of a date feeding operation at the end of a shorter month and an operation of feeding the month indicator by the month end tooth. Due to this construction, it is possible to realize a watch with a calendar mechanism in which the operation of the date feeding mechanism and the month feeding mechanism is stable. 
     Next, the operation in a typical indication state in the watch with a calendar mechanism of the present invention will be described. In the watch with a calendar mechanism of the present invention, in the state in which the “30th day” of a “longer month” is displayed, the month display is “OCT,” which corresponds to “October.” When the date indicator driving wheel rotates, the date feeding portion of the date feeding finger comes into contact with one tooth of the date indicator, and the shorter month end feeding cam of the shorter month end feeding lever does not come into contact with the month cam of a month star. When the date indicator driving wheel further rotates, the date feeding finger further rotates, and the date indicator is fed by one tooth in a fixed direction. The date feeding finger feeds the date indicator by one tooth in a fixed direction, and the date indication is turned to the “31st day.” The month feeding tooth of the date indicator does not come into contact with the finger portion of the month feeding lever, or the month feeding tooth of the date indicator comes into contact with the finger portion of the month feeding lever; however, the month feeding portion of the month feeding lever does not come into contact with a month star tooth portion of the month star, so that, when transition is effected from the state in which the “30th day” of a “longer month” is displayed to the state in which the “31st day” is displayed, no month feeding is effected; thus, the month display is not changed but remains “OCT.” The operation in a “longer month” other than “October” is the same as that for “October.” 
     In the watch with a calendar mechanism of the present invention, in the state in which the “30th day” of a “shorter month” is displayed, the month display is “NOV,” which corresponds to “November”; in this state, a “shorter month” is detected based on the rotation of the date indicator, and, at the same time, the “30th day” is detected. The smaller month end feeding finger of the smaller month end feeding lever feeds the month end tooth of the date indicator, and the month end tooth of the date indicator rotates so as to approach the month feeding lever. Further, when the date indicator driving wheel  210  rotates, the date display is changed to the “31st day.” When the date indicator driving wheel further rotates, the date feeding finger further rotates, and it is possible to feed only one tooth of the date indicator in a fixed direction. The month end tooth of the date indicator causes the month feeding lever to move toward the month star. Due to the movement of the month feeding lever toward the month star, it is possible to feed the month star tooth portion of the month star by only one tooth in a fixed direction. Thus, the date display is changed to the “1st day,” and the month display is changed to “DEC.” The operation at the end of a “shorter month” other than “November” is the same as the operation at the end of “November.” 
     As described above, in the watch with a calendar mechanism of the present invention, in a smaller month, date feeding is effected at the end of the month by the operation of the month end tooth provided on the date indicator, and the month feeding lever is moved toward the month star through the operation of the month end tooth provided on the date indicator, making it possible to effect month feeding. Thus, due to this construction, in the present invention, it is possible to realize a watch with a calendar mechanism whose movement has a small thickness; further, it is possible to realize a watch with a calendar mechanism constructed such that no excessive load is applied to the transmission train wheel at the time of usual date feeding. 
     In the watch with a calendar mechanism of the present invention, the date feeding mechanism and the month feeding mechanism are thin and small. Further, in the watch with a calendar mechanism of the present invention, the structure of the date feeding mechanism and the month feeding mechanism is simple, and the operation thereof is stable. Further, the watch with a calendar mechanism of the present invention can be constructed such that no excessive load is applied to the transmission train wheel at the time of usual date feeding. Further, in the watch with a calendar mechanism of the present invention, the month display is large and easy to see, and there is no need to correct the indication of the date indicator at the end of a month except for February. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic plan view of the structure of a movement as seen from the dial side in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 2  is a partial sectional view of an hour wheel, a month feeding mechanism, etc. in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 3  is a partial sectional view of an hour wheel, a date feeding mechanism, a shorter month end feeding lever, etc. in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 4  is a partial plan view showing a calendar correction mechanism when the winding stem is at the 1st step in a first embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 5  is a partial plan view (1) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from October 30 to October 31 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 6  is a partial plan view (2) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from October 30 to October 31 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 7  is a partial plan view (3) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from October 30 to October 31 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 8  is a partial plan view (4) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from October 30 to October 31 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 9  is a partial plan view (5) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from October 30 to October 31 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 10  is a partial plan view (1) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from October 31 to November 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 11  is a partial plan view (2) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from October 31 to November 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 12  is a partial plan view (3) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from October 31 to November 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 13  is a partial plan view (4) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from October 31 to November 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 14  is a partial plan view (5) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from October 31 to November 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 15  is a partial plan view (6) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from October 31 to November 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 16A  is a partially enlarged plan view showing how a shorter month end feeding finger is held in contact with a month end tooth when the display changes from November 30 to December 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 16B  is a partial plan view (1) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from November 30 to December 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 17A  is a partially enlarged plan view showing how a shorter month end feeding finger is held in contact with a month end tooth and the display is about to change to 31st when the display is changed from November 30 to 31 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 17B  is a partial plan view (2) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from November 30 to December 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 18A  is a partial enlarged plan view showing how a date indictor rotates from November 30 to display 31st day in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 18B  is a partial plan view (3) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from November 30 to December 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 19A  is a partially enlarged plan view showing how a date feeding portion of the date feeding finger comes into contact with a tooth portion of a date indicator and a month end tooth comes into contact with a finger portion of a month feeding lever, with the month feeding lever starting to rotate; 
         FIG. 19B  is a partial plan view (4) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from November 30 to December 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 20A  is a partially enlarged plan view showing how a month end tooth causes a month indicator to rotate via a month feeding lever and the display is about to change to December 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 20B  is a partial plan view (5) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from November 30 to December 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 21  is a partial plan view (6) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from November 30 to December 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 22  is a partial plan view (7) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from November 30 to December 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 23  is a partial plan view (8) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from November 30 to December 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 24  is a partial plan view (9) showing the construction of a date feeding mechanism and a month feeding mechanism when the display changes from November 30 to December 1 in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 25  is a plan view of a complete as indicating October 30, with a date window being arranged in the 3 o&#39;clock direction of a dial, in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 26  is a schematic block diagram showing the construction of a calendar mechanism in an embodiment of the watch with a calendar mechanism of the present invention; 
         FIG. 27  is a schematic plan view showing the construction of a movement consisting of a mechanical watch as seen from the case back side in a first embodiment of the watch with a calendar mechanism of the present invention; and 
         FIG. 28  is a schematic plan view showing the construction of a movement consisting of an electronic watch as seen from the case back side in a second embodiment of the watch with a calendar mechanism of the present invention. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In the following, an embodiment of the watch with a calendar mechanism of the present invention will be described with reference to the drawings. In the embodiment of the present invention described below, the watch with a calendar mechanism is formed as a mechanical watch. While in the example described below the watch with a calendar mechanism of the present invention is applied to a mechanical watch, the present invention is applicable not only to a mechanical watch but also to an analog electronic watch. That is, in this specification, the concept of “a watch with a calendar mechanism” covers a “mechanical watch,” an “analog electronic watch,” and analog watches of all the other operating principles. 
     (1) General Construction of the Movement 
     Referring to  FIGS. 1 through 4  and  FIG. 27 , a movement  100  is formed by a mechanical watch. The movement  100  includes a main plate  102  constituting the substrate of the movement  100 . A dial  104  is mounted to the glass side of the movement  100 . A winding stem  110  is rotatably incorporated into the main plate  102 . A switching device includes the winding stem  110 , a setting lever  120 , a yoke  122 , and a yoke holder  124 . A setting device includes a balance train wheel setting lever  170  and a balance setting pin  170 A. It is desirable for the balance setting pin  170 A to be fixed to the balance train wheel setting lever  170 . 
     (2) Construction of the Front Side of the Movement 
     Next, the construction of the front side of the movement will be described. Referring to  FIGS. 2 through 4  and  FIG. 27 , the movement (the machine body)  100  has the main plate  102  constituting the substrate of the movement. The winding stem  110  is arranged in the “3 o&#39;clock direction” of the movement. The winding stem  110  is rotatably incorporated into the winding stem guide hole of the main plate  102 . The dial  104  is mounted to the movement  100 . An escapement/governor device including a balance with hairspring  340 , an escape wheel &amp; pinion  330 , and a pallet fork  342 , and a front train wheel including a second wheel &amp; pinion  442 , a third wheel &amp; pinion  326 , a center wheel &amp; pinion  325 , and a movement barrel  320 , are arranged on the “front side” of the movement  100 . The switching device including the setting lever, the yoke, and the yoke holder is arranged on the “back side” of the movement. Further, a barrel bridge (not shown) rotatably supporting an upper shaft portion of the movement barrel  320 , a train wheel bridge (not shown) rotatably supporting an upper shaft portion of the third wheel &amp; pinion, an upper shaft portion of the second wheel &amp; pinion  442 , and an upper shaft portion of the escape wheel &amp; pinion  330 , a pallet bridge (not shown) rotatably supporting an upper shaft portion of the pallet fork  342 , and a balance bridge (not shown) rotatably supporting the upper shaft portion of the balance with hairspring  340 , are arranged on the “front side” of the movement  100 . 
     A crown wheel (not shown) is formed so as to be rotatable through rotation of a winding pinion  116 . A crown transmission wheel (not shown) is formed so as to be rotatable through rotation of the crown wheel. A ratchet sliding wheel (not shown) is formed so as to be rotatable through rotation of the crown transmission wheel. A ratchet wheel (not shown) rotates through rotation of the ratchet sliding wheel. The movement barrel  320  is equipped with a barrel wheel, a barrel arbor, and a mainspring. Through rotation of the ratchet wheel, the main spring accommodated in the movement barrel  320  is wound up. 
     The center wheel &amp; pinion  325  is formed so as to rotate through rotation of the movement barrel  320 . The center wheel &amp; pinion  325  includes a center wheel and a center pinion. A barrel wheel is formed so as to be in mesh with the center pinion. The third wheel &amp; pinion  326  is formed so as to be rotatable through rotation of the center wheel &amp; pinion  325 . The third wheel &amp; pinion  326  includes a third wheel and a third pinion. The second wheel &amp; pinion  442  is formed so as to make one rotation per minute through rotation of the third wheel &amp; pinion  326 . The second wheel &amp; pinion  442  includes a second wheel and a second pinion. The third wheel is formed so as to be in mesh with the second pinion. Through rotation of the second wheel &amp; pinion  442 , the escape wheel &amp; pinion  330  rotates while controlled by the pallet fork  342 . The escape wheel &amp; pinion  330  includes an escape wheel and an escape pinion. The second wheel is formed so as to be in mesh with the escape pinion. A minute indicator  446  is formed so as to rotate through rotation of the movement barrel  320 . The movement barrel  320 , the center wheel &amp; pinion  325 , the third wheel &amp; pinion  326 , the second wheel &amp; pinion  442 , and the minute indicator  446  constitute the front train wheel. The escapement/governor device for controlling the rotation of the front train wheel includes the balance with hairspring  340 , the escape wheel &amp; pinion  330 , and the pallet fork  342 . The escape wheel &amp; pinion  330 , the pallet fork  342 , and the balance with hairspring  340  constitute the escapement/governor device. The balance with hairspring  340  includes a balance staff, a balance wheel, and a hairspring. The hairspring is a thin plate spring in the form of a spiral spring with a plurality of number of turns. The balance with hairspring  340  is supported so as to be rotatable with respect to the main plate  102  and the balance bridge. 
     Rotatable supporting is effected with respect to movement barrel  320 , the main plate  102 , and the barrel bridge. The center wheel &amp; pinion  325  is supported so as to be rotatable with respect to the main plate  102  and a center wheel bridge (not shown). A lower shaft portion of the third wheel &amp; pinion  326  and a lower shaft portion of the escape wheel &amp; pinion  330  are supported so as to be rotatable with respect to the main plate  102 . The upper shaft portion of the third wheel &amp; pinion  326 , the upper shaft portion of the second wheel &amp; pinion  442 , and the upper shaft portion of the escape wheel &amp; pinion  330  are supported so as to be rotatable with respect to the train wheel (not shown). The minute indicator  446  is rotatably supported by the outer peripheral portion of a central pipe  103  fixed to a center wheel bridge (not shown). The lower shaft portion of the second wheel &amp; pinion  442  is rotatably supported in the center hole of the central pipe  103  fixed to the center wheel bridge (not shown). The pallet fork  342  is supported so as to be rotatable with respect to the main plate  102  and the pallet bridge  364 . The upper shaft portion of the pallet fork  342  is supported so as to be rotatable with respect to the pallet bridge  364 . The lower shaft portion of the pallet fork  342  is supported so as to be rotatable with respect to the main plate  102 . 
     A minute wheel  166  rotates based on the rotation of the minute indicator  446 . An hour wheel  180  rotates based on the rotation of the minute wheel  166 . When the center wheel &amp; pinion  325  rotates, the second wheel &amp; pinion  442  makes one rotation per minute through rotation of the third wheel &amp; pinion  326 . The hour wheel  180  makes one rotation per hour. The minute indicator  446  is provided with a slip mechanism. 
     (3) Construction of the Switching Device 
     Next, the construction of the front side of the movement will be described. Referring to  FIGS. 1 through 4 , the winding stem  110  has a corner portion and a guide shaft portion. A square hole of a clutch wheel  114  is incorporated into the corner portion of the winding stem  110 . The clutch wheel  114  has a rotation axis which is the same as that of the winding stem  110 . Through fit-engagement of the square hole of the clutch wheel  114  and the corner portion of the winding stem  110 , the clutch wheel  114  rotates based on the rotation of the winding stem  110 . The clutch wheel  114  has a tooth A  114 A and a tooth B  114 B. The tooth A  114 A is provided at the end portion of the clutch wheel  114  nearer to the center of the movement. The tooth B  114 B is provided at the end portion farther from the center of the movement. 
     A winding pinion  116  is rotatably provided on the guide shaft portion of the winding stem  110 . The winding pinion  116  has an inner tooth  116 A and an outer tooth  116 B. In the state in which the winding stem  110  is at a first winding stem position (0th step) nearest to the inner side of the movement along the rotation axis direction, the tooth B  114   b  of the clutch wheel  114  is engaged with the inner tooth  116 A of the winding pinion  116 . When, in this state, the winding stem  110  is rotated, the winding pinion  116  rotates through the rotation of the clutch wheel  114 . In the state in which the winding stem  110  is at the “1st step” and the “2nd step”, the tooth B of the clutch wheel  114  is not in mesh with the inner tooth  116 A of the winding pinion  116 . 
     A setting lever  120  is rotatably arranged on the back side of the main plate  102 . A yoke  122  is rotatably arranged on the back side of the main plate  102 . The yoke  122  is urged by the resilient force of a yoke spring portion  122 A so as to be pressed against the distal end portion of the setting lever  120 . A yoke holder  124  is provided so as to hold the setting lever  120  and the yoke  122 . A setting lever positioning pin provided on the setting lever  120  is engaged with a setting lever positioning chevron-shaped portion of the yoke holder  124 , and positioning is effected on the setting lever  120  at three rotational positions by the yoke holder  124 . 
     The winding stem guide portion of the setting lever  120  is engaged with a step portion  110   c  of the winding stem  110 , and positioning is effected in the rotation axis direction of the winding stem  110  based on the rotation of the setting lever  120 . The clutch wheel guide portion of the yoke  122  is engaged with the step portion of the clutch wheel  114 , and positioning is effected in the rotation axis direction of the clutch wheel  114  based on the rotation of the yoke  122 . Positioning is effected on the yoke  122  at two positions in the rotating direction based on the rotation of the setting lever  120 . 
     In the state in which the winding stem  110  is at the “0th step,” the clutch wheel  114  is at a first position near the outer side of the movement, and, in the state in which the winding stem  110  is at the “1st step” and the “second step,” the clutch wheel  114  is at a second position near the inner side of the movement. 
     The setting lever  120 , the yoke  122 , and the yoke holder  124  constitute the switching device of the watch. The setting lever  120 , and the setting lever positioning chevron-shaped portion of the yoke holder  124  constitute a winding stem positioning means for effecting positioning on the winding stem  110  in the rotation axis direction. The yoke  122  constitutes a clutch wheel positioning means operating based on the operation of the setting lever  120  and the yoke holder  124 . 
     A setting wheel pin  102 C constituting the rotation center of a setting wheel  128  is provided on the back side of the main plate  102  and in the rotation axis of the winding stem  110 . The setting wheel  128  is rotatably assembled to the setting wheel pin  102 C. In the state in which the winding stem  110  is at the “0th step,” the setting wheel  128  is out of mesh with the tooth A  114 A of the clutch wheel  114 , and in the state in which the winding stem  110  is at the “1st step” and the “2nd step,”, it is in mesh with the tooth A  114 A of the clutch wheel  114 . 
     (4) Construction of the Correction Device 
     A rocking bar  130  is provided so as to be rockable around the setting wheel pin  102 C. A rocking bar stopping frame  136  is fitted onto the top portion of the setting wheel pin  102 C. The rocking bar stopping frame (not shown) is provided for the purpose of rockably retaining the rocking bar  130 . The rocking bar stopping frame may be fixed to the top portion of the setting wheel pin  102 C, or the rocking bar stopping frame may be arranged at the top portion of the setting wheel pin  102 C. 
     The rocking bar  130  includes a rocking bar first portion  130 A arranged on one side of the setting wheel pin  102 C, that is, on the 1 o&#39;clock side of a reference axis  112 , and a rocking bar second portion  130 B arranged on the other side of the setting wheel pin  102 C, that is, on the 5 o&#39;clock side of the reference axis  112 . The rocking bar  130  has a setting lever engagement portion  130 E. It is desirable for the setting lever engagement portion  130 E of the rocking bar  130  to be formed as a spring portion capable of elastic deformation. 
     A first correction transmission wheel  132  is rotatably mounted to the rocking bar first portion  130 A. A second correction transmission wheel  134  is rotatably mounted to the rocking bar first portion  130 A. The first correction transmission wheel  132  is in mesh with the setting wheel  128  and a second correction transmission wheel  134 . The first correction transmission wheel  132  has a first correction transmission wheel shaft portion (not shown). 
     A second correction transmission wheel  134  has a second correction transmission wheel shaft portion (not shown). A rocking bar positioning hole (not shown) is provided in the main plate  102 . The second correction transmission wheel shaft portion is arranged in the rocking bar positioning hole. The position of the rocking bar  130  in the rotating direction is determined through the second correction transmission wheel shaft portion coming into contact with the cylindrical wall surface of the rocking bar positioning hole. Thus, when the winding stem  110  is at the second winding stem position (1st step), the first correction transmission wheel  132  and the second correction transmission wheel  134  constitute a first correction train wheel which is provided on the rocking bar  130  and which serves to correct the indication of the date indicator  220  and the month indicator  240  based on the rotation of the setting wheel  128 . 
     While it is desirable for the number of correction transmission wheels constituting the first correction train wheel to be two, it may also be one or three or more. A third correction transmission wheel  140  is rotatably provided on the main plate  102 . A rocking lever  142  is provided so as to be rockable with respect to the third correction transmission wheel. The rocking lever  142  is mounted to the third correction transmission wheel  140  such that the third correction transmission wheel  140  can slip with respect to the rocking lever  142  when a fixed slip torque is exceeded. In an embodiment of the present invention, it is desirable for this slip torque to range from 1 g·cm to 2 g·cm. 
     A correction wheel  144  is rotatably provided on the rocking lever  142 . The correction wheel  144  has a correction pinion (not shown), a correction gear (not shown), and a correction wheel shaft portion (not shown). The third correction transmission wheel  140  is in mesh with the second correction transmission wheel  134  and the correction pinion. A rocking lever positioning hole (not shown) is provided in the main plate  102 . The correction wheel shaft portion is arranged in the rocking lever positioning hole. The position of the rocking lever  142  in the rotating direction is determined through the correction wheel shaft portion coming into contact with the cylindrical wall surface of the rocking lever positioning hole. 
     A date indicator  220  constituting a date indicating member for indicating date is rotatably incorporated into the main plate  102 . The date indicator  220  has 31 date indicator teeth, and is rotated by a date feeding mechanism (described below). The position of the date indicator  220  in the rotating direction is determined by a date jumper  260 . A date indicator maintaining plate  264  retains the date indicator  220 . 
     There is provided a month indicator  240  constituting a month indicating member for indicating month. The month indicator  240  has a month star  247  having 12 teeth, and the month star  240  is rotated by a month feeding mechanism (described below). The position of the month indicator  240  in the rotating direction is determined by a month jumper  262 . A month corrector setting wheel  158  is rotatably incorporated. The month corrector setting wheel  158  is in mesh with the month star  247 . 
     A first intermediate minute wheel  160  is rotatably mounted to a rocking bar second portion  130 B. A second intermediate minute wheel  162  is rotatably mounted to the rocking bar second portion  130 B. The first intermediate minute wheel  160  is in mesh with the setting wheel  128  and the second intermediate minute wheel  162 . A minute wheel  166  is arranged in a “second region.” 
     The first intermediate minute wheel  160  and the second intermediate minute wheel  162  constitute a second correction train wheel which is provided on the rocking bar  130  and which serves to rotate the minute wheel  166  based on the rotation of the setting wheel  128  to correct the indication of the time indicating member when the winding stem  110  is at a third winding stem position (2nd step). While it is desirable for the number of intermediate minute wheels constituting the second correction train wheel to be two, it may also be one or three or more. 
     (5) Construction of the Setting Device 
     A balance train wheel setting lever  170  that operates based on the operation of the switching device to set the operation of the time indicating member is provided so as to be rotatable around the rotation center of the yoke  122 . When the winding stem  110  is at the 0th step and 1st step, the balance train wheel setting lever  170  is rotated clockwise by the setting lever  120 , and a rocking bar contact portion (not shown) of the balance train wheel setting lever  170  abuts the first correction transmission shaft portion to effect positioning. 
     The balance train wheel setting lever  170  pushes the first correction transmission shaft portion, whereby the rocking bar  130  is rotated clockwise. As described above, the position of the rocking bar  130  in the rotating direction is determined when the rocking bar  130  rotates clockwise and the second correction transmission shaft portion abuts the cylindrical wall surface of the rocking bar positioning hole. When the winding stem  110  is at the 0th step and 1st step, the balance setting pin  170 A of the train wheel setting lever  170  does not come into contact with a balance with hairspring  340 . When the winding stem  110  is at the third winding stem position (2nd step), the balance setting pin  170 A of the train wheel setting lever  170  comes into contact with the balance with hairspring  340 . 
     (6) Construction of the Calendar Mechanism 
     Next, the construction of the calendar mechanism will be described.  FIG. 1  is a plan view showing the construction of the back side of the movement  100  as seen from the dial side in the state in which October 30 is displayed. Referring to  FIGS. 1 through 5 , the movement  100  is equipped with a first intermediate date wheel  265  adapted to rotate through rotation of the hour wheel  180 , a second intermediate date wheel  266  adapted to rotate through rotation of the first intermediate date wheel  265 , a date indicator driving wheel  210  adapted to rotate through rotation of the second intermediate date wheel  266 , the date indicator  220  indicating date, a date jumper  260  for setting the position of the date indicator  220  in the rotating direction, the month indicator  240  indicating month, a month jumper  262  for setting the position of the month indicator  240  in the rotating direction, and a date indicator maintaining plate  264  supporting the date indicator  220  so as to allow it to rotate counterclockwise with respect to the main plate  102 . The date indicator driving wheel  210  is constructed so as to make one counterclockwise rotation per 24 hours. The date indicator driving wheel  210  has a lever driving pin  211 . 
     It is desirable for the rotation center of the date indicator driving wheel  210  to be arranged in the movement  100  between the “6 o&#39;clock direction” and the “9 o&#39;clock direction.” More preferably, the rotation center of the date indicator driving wheel  210  is arranged in the movement  100  between the “7 o&#39;clock direction” and the “8 o&#39;clock direction.” The date indicator driving wheel  210  is preferably arranged so as not to overlap the movement barrel  320 . It is desirable for the rotation center of the date indicator  220  to be at the same position as the rotation center of the hour wheel  180 . 
     The date indicator  220  includes an inner side wall portion  221  facing the inner side of the movement, a date plate portion  225  including a date indicating surface portion  224  provided with date letters  223 , and a date indicator tooth portion  226 . The date indicator tooth portion  226  includes 31 inner teeth arranged at equal angular intervals (360/31 degrees). The date letters  223  may consist of numbers indicating 31 “dates” arranged at equal angular intervals (360/31 degrees) (e.g., “1,” “2,” “3,” . . . “29,” “30,” and “31”). 
     The inner side wall portion  221  of the date indicator  220  is arranged on the inner side of the date indicating surface portion  224 . The date indicator tooth portion  226  is arranged on the down surface side of the date indicator  220 . On the inner side wall portion  221  of the date indicator  220 , there is provided a month end tooth  288  for enabling the operation of feeding the date indicator  220  when the date indicator  220  indicates “30th day” in a shorter month and the operation of feeding the month indicator  240  when the date indicator  220  indicates “31st day.” The month end tooth  288  is formed on the inner side wall portion  221  of the date indicator  220  as an only one protrusion protruding radially inwards. 
     The month indicator  240  includes a month plate  245  inclusive of a month indicating surface portion  244  provided with month letters  243 , a month star  247  inclusive of a month star tooth portion  246 , and month cams  248  corresponding to times when the indication of the month indicator  240  is a “longer month” (i.e., “January” or “JAN” or the like, “March” or “MAR” or the like, “May” or “MAY” or the like, “July” or “JUL” or the like, “August” or “AUG” or the like, “October” or “OCT” or the like, “December” or “DEC” or the like). The month cams  248  are formed as recesses recessed radially inwards at seven positions as a January cam  248 A corresponding to January, a March cam  248 B corresponding to March, a May cam  248 C corresponding to May, a July cam  248 D corresponding to July, an August cam  248 E corresponding to August, an October cam  248 F corresponding to October, and a December cam  248 G corresponding to December. Using the January cam  248 A as a reference position, the month cams  248  are arranged counterclockwise sequentially at the following angular intervals: (2*360/12 degrees), (2*360/12 degrees), (2*360/12 degrees), (1*360/12 degrees), (2*360/12 degrees), (2*360/12 degrees), and (1*360/12 degrees) (See  FIG. 5 ). 
     The month star tooth portion  246  includes 12 outer teeth arranged at equal angular intervals (360/12 degrees). The month letters  243  may consist of twelve letters indicating “months” arranged at equal angular intervals (360/12 degrees) (e.g., “JAN,” “FEB,” . . . , “NOV,” “DEC,” etc.). Alternatively, the month letters  243  may consist of twelve numbers, symbols, letters, abbreviations, or appropriate combinations thereof indicating “months” (e.g., “January,” “February,” . . . “November,” and “December,” or “Jan,” “Feb,” . . . “Nov,” “Dec,” etc.). 
     Shorter month detecting cams  249  are provided for the purpose of detecting times when the month indicator  240  indicates a “shorter month” (that is, “February,” “April,” “June,” “September,” and “November”). The shorter month detecting cams  249  are provided at five positions as protrusions protruding radially outwards. The distal end portions of the protrusions are preferably formed as a part of arcs of the same radius. The shorter month detecting cams  249  include five recesses: a February cam  249 A corresponding to February, an April cam  249 B corresponding to April, a June cam  249 C corresponding to June, a September cam  249 D corresponding to September, and a November cam  249 E corresponding to November. Using the February cam  249 A as a reference, the shorter month detecting cams  249  are arranged sequentially clockwise at the following angular intervals: (2*360/12 degrees), (2*360/12 degrees), (3*360/12 degrees), (2*360/12 degrees), and (3*360/12 degrees). 
     The setting portion of the date jumper  260  is constructed so as to set the date indicator tooth portion  226 . The setting portion of the month jumper  262  is constructed so as to set the month star tooth portion  246 . It is desirable for the rotation center of the month indicator  240  to be at the same position as the rotation center of the hour wheel  180 . Thus, the rotation center of the month indicator  240  is preferably at the same position as the rotation center of the date indicator  220 . The month indicating surface portion  244  of the month indicator  240  is arranged on the inner side of the date indicating surface portion  224  of the date indicator  220 . 
     A date feeding finger  212  for feeding the date indicator tooth portion  226  of the date indicator  220  is provided so as to rotate integrally with the rotation of the date indicator driving wheel  210 . The date feeding finger  212  includes a date feeding portion  213  arranged at the distal end and a date feeding finger spring portion  214 . The proximal portion of the date feeding finger spring portion  214  is fixed to the date indicator driving wheel  210 . Through rotation of the date indicator driving wheel  210 , the date feeding finger  212  rotates, and the date indicator  220  can be rotated by the date feeding finger  212  intermittently counterclockwise once in 24 hours by 360/31 degrees. 
     The date feeding finger  212  is formed of a material capable of elastic deformation (e.g., an engineering plastic such as polyacetal). The date feeding finger can be formed so as to be integral with the date indicator driving wheel  210 . The date feeding finger  212  is formed separately from the date indicator driving wheel  210 , and can rotate integrally through rotation of the date indicator driving wheel  210 . 
     A month feeding lever  270  is operably arranged between the month plate  245  and the date indicator maintaining plate  264 . The month feeding lever  270  is arranged so as to face the upper surface of the date indicator maintaining plate  264 . Two month feeding lever guide pins  271  and  273  are provided on the date indicator maintaining plate  264  so as to operably guide and retain the month feeding lever  270 . While it is desirable to provide two month feeding lever guide pins as shown in the drawings, the number of month feeding lever guide pins may also be three or more. A disc-like retaining portion of the month feeding lever guide pins  271  and  273  retain the month feeding lever  270  so as to face the date indicator maintaining plate  264 . 
     The month feeding lever  270  includes a month feeding portion  270 A arranged so as to be capable of coming into contact with the month wheel  246  of the month indicator  240 , an operation guide portion  270 B arranged so as to be capable of coming into contact with the month feeding lever guide pin  273 , a month feeding operating portion  270 C arranged so as to be capable of coming into contact with the month end tooth  288  of the date indicator  220 , and a month feeding lever spring portion  270 D. The portion of the month feeding lever spring portion  270 D near the distal end portion thereof is formed so as to come into contact with a month feeding lever spring pin  270 F provided on the date indicator maintaining plate  264 . The rotation center of the date indicator driving wheel  210  is formed by a date indicator driving wheel pin  102 P provided on the main plate  102 . 
     A shorter month end feeding lever  282  is operably arranged between the month plate  245  and the date feeding finger  212 . The shorter month end feeding lever  282  includes a shorter month end feeding cam  284  arranged so as to be capable of coming into contact with the shorter month detecting cam  249 , a sector-shaped hole portion  282 B arranged so as to be capable of coming into contact with the lever driving pin  211 , a shorter month end feeding finger  286  arranged so as to be capable of coming into contact with the month end tooth  288  of the date indicator  220 , and a lever elongated hole  282 C. Positioning is effected on the shorter month end feeding lever  282  based on the rotation of the date indicator driving wheel  210  and the rotation of the month indicator  240 , making it possible to rotate the date indicator  220  at the end of a shorter month. The shorter month end feeding lever  282  is arranged on the upper side of the date feeding finger  212 , and can move with respect to the rotation center of the date indicator driving wheel  210 . 
     The lever driving pin  211  is arranged in the sector-shaped hole portion  282 B of the shorter month end feeding lever  282 . The shorter month end feeding lever  282  is rotated by the lever driving pin  211 . The lever elongated hole  282 C of the shorter month end feeding lever  282  is arranged so as to face the date indicator driving wheel pin  102 P. The shorter month end feeding lever  282  with the lever elongated hole  282 C being guided by the date indicator driving wheel pin  102 P, the shorter month end feeding lever  282  can move with respect to the month end tooth  288  radially outwards away from the center of the main plate  102  along the month cam  248  provided on the month indicator  240  and based on the rotation of the date indicator driving wheel  210 . Due to this construction, it is possible to realize a watch with a calendar mechanism in which the operations of the date feeding mechanism and of the month feeding mechanism are stable. Further, due to this construction, it is possible to prevent an excessive load from being applied to the transmission train wheel at the time of usual date feeding. 
     When the date indicator  220  is rotated such that the indication of the date indicator  220  is changed from “31st day” to “1st day,”, the month end tooth  288  of the date indicator  220  comes into contact with the month feeding operation portion  270 C of the month feeding lever  270 , making it possible to move the month feeding lever  270  toward the month indicator  240 . Through the movement of the month feeding lever  270 , the month feeding portion  270 A rotates the month star tooth portion  246  and the month indicator  240 , making it possible to change the indication of the month indicator  240 . 
     (7) Operation of the Watch with a Calendar Mechanism 
     (7.1) Display of Time Information 
     Next, the operation of the watch with a calendar mechanism of the present invention will be described. Referring to  FIG. 25 , the movement  100  is incorporated into a watch case  310 , and the dial  104 , a crown  310 , an hour hand  464 , a minute hand  462 , and a second hand  460  are mounted to form a complete  300 . Through a window  304  provided in the dial  104 , it is possible to read the number “30” provided on the date indicating surface portion  224  and indicating date, and the letters “OCT” provided on the month indicating surface portion  244  and indicating month. That is, the complete  300  indicates “October 30.” While  FIG. 19B  shows an embodiment of the watch with a calendar mechanism in which the window  304  is formed in the “3 o&#39;clock” direction of the dial  104 , it is also possible to realize a watch with a calendar mechanism in which the window is formed at a position of the dial  104  other than the “3 o&#39;clock direction” through appropriate selection of the arrangement and orientation of the date letters and month letters. 
     Referring to  FIGS. 1 through 4  and  FIGS. 26 and 27 , the mainspring (not shown) incorporated into the movement barrel  320  constitutes the power source of the watch. Through re-winding (releasing) of the mainspring, the barrel wheel of the movement barrel  320  rotates in one direction, and time information is displayed by the hands (the hour hand, the minute hand, the secondhand, etc.) through rotation of the front train wheel and the back train wheel. The rotation of the barrel wheel, which is rotated by the power of the mainspring, is controlled by the governor device and the escapement device. The governor device includes the balance with hairspring  340 . The escapement device includes the pallet fork  342  and the escape wheel &amp; pinion  330 . Through rotation of the barrel wheel, the center wheel &amp; pinion  325  rotates. Through the rotation of the center wheel &amp; pinion  325 , the third wheel &amp; pinion  326  rotates. Through the rotation of the third wheel &amp; pinion  326 , the second wheel &amp; pinion  442  makes one rotation per minute. 
     The rotation speed of the second wheel &amp; pinion  442  is controlled by the escape wheel &amp; pinion  330 . The rotation speed of the escape wheel &amp; pinion  330  is controlled by the pallet fork  342 . The rocking motion of the pallet fork  342  is controlled by the balance with hairspring  340 . Through the rotation of the movement barrel  320 , the minute wheel  446  makes one rotation per hour. The minute hand  462  mounted to the minute wheel  446  indicates “minute” of the time information. The second hand  460  mounted to the second wheel &amp; pinion  442  indicates “second” of the time information. The rotation center of the second wheel &amp; pinion  442  and the rotation center of the minute wheel  446  are at the same position. Through rotation of the minute wheel  446 , the minute wheel  166  rotates. Through the rotation of the minute wheel  166 , the hour wheel  180  makes one rotation in 12 hours. The hour hand  464  mounted to the hour wheel  180  indicates the “hour” of the time information. 
     (7.2) Calendar Feeding Operation: 
     (7.2.1) Operation in a “Longer Month” Other Than that at the Month End: 
     Next, the calendar feeding operation of the watch with a calendar mechanism of the present invention will be described. Referring to  FIGS. 1 through 3  and  FIG. 26 , except for the month end of a “longer month,” the lever elongated hole  282 C of the shorter month end feeding lever  282  is guided by the date indicator driving wheel pin  102 P, and the shorter month end feeding cam  284  of the month feeding lever  270  is arranged at a position where it can come into contact with the month cam  248  of the month indicator  240 , and the shorter month end feeding lever  282  can be situated at a position radially on the outer side of the main plate  102  (the position shown in  FIG. 1 ). The shorter month end feeding lever  282  can freely move between the radially outer position of the main plate  102  and the radially inner position of the main plate  102 . The month end tooth  288  of the date indicator  220  is arranged at a position where it does not come into contact with the month feeding operation portion  270 C of the month feeding lever  270 . 
     When, in this state, the date indicator driving wheel  210  rotates through rotation of the first intermediate date wheel  265 , which is rotated by the rotation of the hour wheel  180 , and through rotation of the second intermediate date wheel  266 , the date feeding finger  212  and the lever driving pin  211  also rotate. When the date feeding finger  212  rotates, the date feeding portion  213  of the date feeding finger  212  can feed the date indicator tooth portion  226  of the date indicator  220  counterclockwise by only one tooth. The watch may be constructed such that the operation of date feeding can be conducted between, for example, 8 p.m. and 12 p.m. In this state, even when the date indicator  220  rotates, the month feeding lever  270  does not operate. The position of the date indicator  220  in the rotating direction after the operation of date feeding is set by the date jumper  260 . 
     In this state, when the date indicator driving wheel  210  and the lever driving pin  211  rotate, the shorter month end feeding lever  282  rotates around the date indicator driving wheel pin  102 P; however, the shorter month end feeding finger  286  of the shorter month end feeding lever  282  is arranged at a position where it does not come into contact with the month end tooth  288  of the date indicator  220 . Thus, in this state, even when the shorter month end feeding lever  282  rotates, the date indicator  220  does not rotate. Thus, except for the end of a “longer month,” the date indicator tooth portion  226  of the date indicator  220  is fed by only one tooth, and the date display is changed by only one day. Except for the end of a “longer month,” no month feeding is effected, so that the month display is not changed. 
     (7.2.2) Operation in a “Shorter Month” Except for that at the End of the Month 
     Referring to  FIGS. 2 and 3  and  FIG. 26 , except for the month end of a “shorter month,” the lever elongated hole  282 C of the shorter month end feeding lever  282  is guided by the date indicator driving wheel pin  102 P, and the shorter month end feeding cam  284  of the shorter month end feeding lever  282  is arranged at a position corresponding to the shorter month detecting cam  249  of the month indicator  240 . 
     In this state, when the date indicator driving wheel  210  and the lever driving pin  211  rotate, the shorter month end feeding lever  282  rotates around the date indicator driving wheel pin  102 P; however, the shorter month end driving finger of the shorter month end feeding lever  282  is arranged at a position where it does not come into contact with the month end tooth  288  of the date indicator  220 . In this state, even when the shorter month end feeding lever  282  rotates, the date indicator  220  does not rotate. Thus, except for the end of a “shorter month,” the date indicator tooth portion  226  of the date indicator  220  is fed by only one tooth, and the date display is changed by only one day. The position of the date indicator  220  in the rotating direction after the date feeding operation is set by the date jumper  260 . Except for the month end of a “shorter month,” no month feeding is effected, so that the month indication does not change. That is, the operation in a “shorter month” except for that at the month end is the same as the operation in a “longer month” except for that at the month end. 
     (7.2.3) Operation of Changing from “30th Day” to “31st Day” in a “Longer Month”: 
     Referring to  FIGS. 5 through 9  and  FIG. 26 , in the state in which the “30th day” of a “longer month” is displayed, the month display is “OCT,” which corresponds to “October.” The shorter month end feeding lever  282  can be arranged at a radially outer position of the main plate  102  (the position shown in  FIG. 5 ). The shorter month end feeding lever  282  can freely move between the radially inner position of the main plate  102  and the radially outer position of the main plate  102 . The month end tooth  288  of the date indicator  220  is arranged at a position where it does not come into contact with the month feeding operation portion  270 C of the month feeding lever  270 . 
     Referring to  FIG. 6 , when the date indicator driving wheel  210  rotates through rotation of the first intermediate date wheel  265 , which rotates through rotation of the hour wheel  180 , and through rotation of the second intermediate date wheel  266 , the date feeding finger  212  and the lever driving pin  211  also rotate at the same time. When the date feeding finger  212  rotates, the date feeding portion  213  of the date feeding finger  212  can rotate counterclockwise so as to approach the date indicator tooth portion  226  of the date indicator  220 . 
     In this state, when the date indicator driving wheel  210  and the lever driving pin  211  rotate, the shorter month end feeding lever  282  rotates around the date indicator driving wheel pin  102 P, and the shorter month end feeding finger  286  of the shorter month end feeding lever  282  comes into contact with the month end tooth  288  of the date indicator  220 . The shorter month end feeding lever  282  is moved toward the radially inner position of the main plate  102  by the month end tooth  288  of the date indicator  220 . Thus, in this state, even when the shorter month end feeding lever  282  rotates, the date indicator  220  does not rotate. 
     Referring to  FIG. 7 , when the date indicator driving wheel  210  further rotates, the date feeding finger  212  further rotates, and the date feeding portion  213  of the date feeding finger  212  comes into contact with one tooth of the date indicator tooth portion  226  of the date indicator  220 . The month end tooth  288  of the date indicator  220  is arranged at a position where it does not come into contact with the month feeding operation portion  270 C of the month feeding lever  270 . 
     Referring to  FIG. 8 , when the date indicator driving wheel  210  further rotates, the date feeding finger  212  further rotates, and the date indicator tooth portion  226  of the date indicator  220  can be fed counterclockwise by only one tooth. The position of the date indicator  220  in the rotating direction after the date feeding operation is set by the date jumper  260 . The month end tooth  288  of the date indicator  220  is arranged at a position where it does not come into contact with the month feeding operation portion  270 C of the month feeding lever  270 . 
     Referring to  FIG. 9 , the date feeding finger  212  has fed the date indicator tooth portion  226  of the date indicator  220  counterclockwise by one tooth, and the date display is changed to “31st day.” The month end tooth  288  of the date indicator  220  is arranged at a position where it comes into contact with the month feeding operation portion  270 C of the month feeding lever  270 , or at a position where it does not come into contact with the month feeding operation portion  270 C of the month feeding lever  270 ; however, the month feeding portion  270 A of the month feeding lever  270  does not come into contact with the month star tooth portion  246  of the month indicator  240 . Thus, when transition is effected from the state in which the “30th day” of a “longer month” is displayed to the state in which “31st day” thereof is displayed, no month feeding is effected, so that the month display does not change but remains “OCT.” The operation of changing from the “30th day” to the “31st day” of a longer month other than “October” is the same as the operation of changing from the “30th day” to the “31st day” of “October.” 
     (7.2.4) Operation of Changing from the “31st day” of a “Longer Month” to the “1st day” of the Next Month: 
     Referring to  FIGS. 2 and 3 ,  FIG. 10 , and  FIG. 26 , in the state in which the “31st day” of a “longer month” is displayed, the month display is “OCT,” which corresponds to “October.” In this state, the shorter month end feeding lever  282  can be arranged at a position on the radially outer side of the main plate  102  (the position as shown in  FIG. 10 ). The shorter month end feeding lever  282  can freely move between the radially outer position of the main plate  102  and the radially inner position of the main plate  102 . The month end tooth  288  of the date indicator  220  is arranged at a position where it can come into contact with the month feeding operation portion  270 C of the month feeding lever  270 . 
     Referring to  FIG. 11  and  FIG. 26 , when the date indicator driving wheel  210  rotates through rotation of the first intermediate date wheel  265 , which rotates through rotation of the hour wheel  180 , and through rotation of the second intermediate date wheel  266 , the date feeding finger  212  and the lever driving pin  211  also rotate at the same time. When the date feeding finger  212  rotates, the date feeding portion  213  of the date feeding finger  212  can rotate counterclockwise so as to approach the date indicator tooth portion  226  of the date indicator  220 . In this state, when the date indicator  220  rotates counterclockwise, the month end tooth  288  of the date indicator  220  comes into contact with the month feeding operation portion  270 C of the month feeding lever  270 . When the month end tooth  288  of the date indicator  220  is arranged at this position, the month feeding lever  270  can move toward the month star tooth portion  246 . When the month feeding lever  270  moves toward the month star tooth portion  246  and comes into contact with the month feeding portion  270 A, the month star tooth portion  246  rotates clockwise. 
     In this state, when the date indicator driving wheel  210  and the lever driving pin  211  rotate, the shorter month end feeding lever  282  rotates around the date indicator driving wheel pin  102 P; however, the shorter month end feeding finger  286  of the shorter month end feeding lever  282  does not come into contact with the month end tooth  288  of the date indicator  220 . Thus, in this state, even when the shorter month end feeding lever  282  rotates, the date indicator  220  does not rotate. 
     Referring to  FIG. 12 , when the date indicator driving wheel  210  further rotates, the date feeding finger  212  further rotates. Due to the month end tooth  288  of the date indicator  220 , the month feeding lever  270  moves toward the month star tooth portion  246  to come into contact with the month feeding portion  270 A, and the month star tooth portion  246  can be fed clockwise by only one tooth. The position of the month indicator  240  in the rotating direction after the month feeding operation is set by the month jumper  262 . 
     Referring to  FIG. 13 , when the date indicator driving wheel  210  rotates, the date feeding finger  212  further rotates, and the date indicator tooth portion  226  of the date indicator  220  can be fed counterclockwise by only one tooth. The position of the date indicator  220  in the rotating direction after the date feeding operation is set by the date jumper  260 . 
     Referring to  FIG. 14 , when the date indicator driving wheel  210  further rotates, the date feeding finger  212  further rotates, and the month end tooth  288  of the date indicator  220  is detached from the month feeding operation portion  270 C of the month feeding lever  270 . Due to the resilient force of the spring portion  270 D of the month feeding lever, the month feeding lever  270  moves away from the month wheel  242 . 
     Referring to  FIG. 15 , the date feeding finger  212  has fed the date indicator tooth portion  226  of the date indicator  220  counterclockwise by only one tooth, and the date display is changed to “1st day.” Through the movement of the month feeding lever  270 , the month end tooth  288  of the date indicator  220  has fed the month star tooth portion  246  of the month star  247  clockwise by only one tooth, and the month display is changed to “NOV.” The operation of the date feeding and month feeding can be performed, for example, between 8 p.m. and 12 p.m. The operation at the end of a “longer month” other than “October” is the same as the operation at the end of “October.” 
     (7.2.5) Operation of Changing from the “30th Day” of a “Shorter Month” to the “1st Day” of the Next Month: 
     Referring to  FIGS. 1 through 3 ,  FIG. 16B , and  FIG. 26 , in the state in which the “30th day” of a “shorter month” is displayed, the month display is “NOV,” which corresponds to “November,” and the date display is “30,” which corresponds to “30th day.” In this state, the November cam  249 E of the month indicator  240  is arranged at a position where it comes into contact with the shorter month end feeding cam  284  of the shorter month end feeding lever  282 . That is, the November cam  249 E of the month indicator  240  is arranged at the “shorter month detecting” position. In this state, the shorter month end feeding lever  282  is arranged at the radially outer position of the main plate  102  (the position as shown in  FIG. 16B ). The month end tooth  288  of the date indicator  220  is arranged at a position where it does not come into contact with the month feeding operation portion  270 C of the month feeding lever  270 . 
     When the date indictor driving wheel  210  rotates through rotation of the first intermediate date wheel  265 , which rotates through rotation of the hour wheel  180 , and through rotation of the second intermediate date wheel  266 , the date feeding finger  212  and the lever driving pin  211  also rotate at the same time. When the date feeding finger  212  rotates, the date feeding portion  213  of the date feeding finger  212  can rotate counterclockwise so as to approach the date indicator tooth portion  226  of the date indicator  220 . 
       FIG. 16A  is a partially enlarged plan view showing how, in the state in which transition is effected from November 30 to December 1, the shorter month end feeding finger  286  is held in contact with the month end tooth  288 . Referring to  FIG. 16A , the month end tooth distal end position angle KAJ, which is made by the straight line connecting the rotation center  220 C of the date indicator  220  and the rotation center  210 C of the date indicator driving wheel  210  and the straight line connecting the rotation center  220 C of the date indicator  220  and the distal end portion of the month end tooth  288  preferably ranges from 0 degree to ½ of a day regulating angle. Here, the term “day regulating angle” is defined as the rotation angle by which the date indicator  220  is rotated at the time of date feeding until the distal end portion of the tooth portion of the date indicator  220  comes into contact with the distal end portion of the date jumper  260 . Generally speaking, the “day regulating angle” is set so as to be ½ to ⅔ of the pitch angle (360/31 degrees) of the date indicator for one day. The “day regulating angle” assumes different values depending upon the setting of the position of the rotation center of the date jumper  260 . In the state shown in  FIG. 16A , the month end tooth distal end position angle KAJ is, for example, 2.2 degrees. 
     Referring to  FIG. 17B , when the date indicator driving wheel  210  and the lever driving pin  211  rotate, the shorter month end feeding lever  282  rotates around the date indicator driving wheel pin  102 P, and the shorter month end feeding finger  286  of the shorter month end feeding lever  282  comes into contact with the month end tooth  288  of the date indicator  220 . That is, in the state in which the “30th day” of a “shorter month” is displayed, when the month end tooth  288  of the date indicator  220  is arranged at this position, it is possible to rotate the date indicator  220  by the shorter month end feeding lever  282 . Further, when the shorter month end feeding lever  282  rotates, the shorter month end feeding finger  286  comes into contact with the month end tooth  288  of the date indicator  220 , making it possible to rotate the date indicator  220 . 
       FIG. 17A  is a partially enlarged plan view showing how, during transition from November 30 to 31, the shorter month end feeding finger comes into contact with the month end tooth and the date display is about to change to 31st day. Referring to  FIG. 17A , the month end tooth distal end position angle KAK, which is made by the straight line connecting the rotation center  220 C of the date indicator  220  and the rotation center  210 C of the date indicator driving wheel  210  and the straight line connecting the rotation center  220 C of the date indicator  220  and the distal end portion of the month end tooth  288 , ranges preferably from 0 degree to ½ of the day regulating angle. In the state shown in  FIG. 17A , the month end tooth distal end position angle KAK is, for example, 3.6 degrees. It is desirable for the month end tooth distal end position angle KAK in the state shown in  FIG. 17A  to be of much the same magnitude as the month end tooth distal end position angle KAJ in the state shown in  FIG. 16A . 
     Referring to  FIG. 18B , when the date indicator driving wheel  210  further rotates, the date feeding finger  212  further rotates, and the date feeding portion  213  of the date feeding finger  212  approaches a tooth of the date indicator tooth portion  226  of the date indicator  220 . When, in this state, the date indicator driving wheel  210  and the lever driving pin  211  rotate, the shorter month end feeding lever  282  rotates around the date indicator driving wheel pin  102 P, and the shorter month end feeding finger  286  of the shorter month end feeding lever  282  comes into contact with the month end tooth  288  of the date indicator  220 , rotating the date indicator  220  counterclockwise. 
       FIG. 18A  is a partially enlarged plan view showing how the date display is changed from November 30 to 31 through rotation of the date indicator. Referring to  FIG. 18A , the month feeding lever center position angle KAT, which is made by the straight line connecting the rotation center  220 C of the date indicator  220  and the rotation center  210 C of the date indicator driving wheel  210  and the straight line connecting the rotation center  220 C of the date indicator  220  and the rotation center  270 G of the month feeding lever  270 , is preferably the pitch angle of the date indicator  220  for one day (360/31 degrees), or an angle not larger than the pitch angle of the date indicator  220  for one day (360/31 degrees). In the state shown in  FIG. 18A , the month feeding lever center position angle KAT is, for example, 10.2 degrees. In the state shown in  FIG. 18A , the month end tooth  288  of the date indicator  220  has been rotated from the state shown in  FIG. 16A  by the pitch angle of the date indicator  220  for one day (360/31 degrees). 
     Referring to  FIG. 19B , when the date indicator driving wheel  210  further rotates, the shorter month end feeding lever  282  further rotates, and the date indicator tooth portion  226  of the date indicator  220  can be fed counterclockwise by only one tooth. The position of the date indicator  220  in the rotating direction after the date feeding operation is set by the date jumper  260 . As a result, the date display is shifted from “30,” which corresponds to “30th day,” to “31,” which corresponds to “31st day.” The month end tooth  288  of the date indicator  220  is arranged at a position where it comes into contact with the month feeding operation portion  270 C of the month feeding lever  270  or a position where it approaches the month feeding operation portion  270 C of the month feeding lever  270 . 
     Referring to  FIG. 19B , when the date indicator driving wheel  210  further rotates, the date feeding finger  212  is arranged at a position where it comes into contact with the date indicator tooth portion  226  of the date indicator  220 . The month end tooth  288  of the date indicator  220  is arranged at a position where it comes into contact with the month feeding operation portion  270 C of the month feeding lever  270 . The shorter month end feeding finger  286  of the shorter month end feeding lever  282  is arranged at a position where it is away from the month end tooth  288  of the date indicator  220 . 
       FIG. 19A  is a partially enlarged plan view showing how the date feeding portion of the date feeding finger comes into contact with the tooth portion of the date indicator and the month end tooth comes into contact with the finger portion of the month feeding lever, causing the month feeding lever to start rotating. Referring to  FIG. 19A , the month feeding lever month end tooth position angle KAG, which is made by the straight line connecting the rotation center  220 C of the date indicator  220  and the rotation center  270 G of the month feeding lever  270 , and the straight line connecting the rotation center  220 C of the date indicator  220  (that is, the rotation center of the month indicator  240 ) and the distal end portion of the month end tooth  288 , ranges preferably from 0 degree to ½ of the day regulating angle. In the state shown in  FIG. 19A , the month feeding lever month end tooth position angle KAG is, for example, 0.8 degrees. 
     Referring to  FIGS. 20B and 26 , when the date indicator driving wheel  210  further rotates, the date feeding finger  212  further rotates, and it is possible to rotate the date indicator tooth portion  226  of the date indicator  220  counterclockwise. The month end tooth  288  of the date indicator  220  moves the month feeding lever  270  toward the month wheel  242 . The month feeding lever  270  moves toward the month star tooth portion  246  and comes into contact with the month feeding portion  270 A, making it possible to rotate the month star tooth portion  246  of the month star  247  clockwise. 
       FIG. 20A  is a partially enlarged plan view showing how the month end tooth rotates the month indicator via the month feeding lever, and transition to December 1 is about to be effected. Referring to  FIG. 20A , the month feeding lever month end tooth position angle KAH, which is made by the straight line connecting the rotation center  220 C of the date indicator  220  and the rotation center  270 G of the month feeding lever  270 , and the straight line connecting the rotation center  220 C of the date indicator  220  (that is, the rotation center of the month indicator  240 ) and the distal end portion of the month end tooth  288 , ranges preferably from 0 degree to ½ of the day regulating angle. In the state shown in  FIG. 20A , it is desirable that the date indicator  220  be caused to undergo day regulating operation by the date jumper  260  and be about to be rotated to the next display, i.e., “1st day.” That is, it is desirable that the value of the sum total of the month feeding lever month end tooth position angle KAG in the state shown in  FIG. 19A  and the month feeding lever month end tooth position angle KAH in the state shown in  FIG. 20A  be set to be smaller than the day regulating angle. In the state shown in  FIG. 20A , the month feeding lever month end tooth position angle KAH is, for example, 3.8 degrees. 
     Referring to  FIGS. 21 and 26 , when the date indicator driving wheel  210  further rotates, the date feeding finger  212  further rotates, and the date indicator tooth portion  226  of the date indicator  220  can be fed counterclockwise by only one tooth. The month end tooth  288  of the date indicator  220  moves the month feeding lever  270  toward the month wheel  242 , and the month star tooth portion  246  of the month star  247  can be fed clockwise by only one tooth. The position of the month indicator  240  in the rotating direction after the month feeding operation is set by the month jumper  262 . As a result, the month display is shifted from “NOV,” which corresponds to “November,” to “DEC,” which corresponds to “December.” 
     Referring to  FIG. 22 , when the date indicator driving wheel  210  further rotates, the date feeding finger  212  further rotates, and the date indicator tooth portion  226  of the date indicator  220  can be rotated counterclockwise. 
     Referring to  FIG. 23 , when the date indicator driving wheel  210  further rotates, the date feeding finger  212  further rotates, and the date indicator tooth portion  226  of the date indicator  220  can be fed counterclockwise. The position of the date indicator  220  in the rotating direction after the date feeding operation is set by the date jumper  260 . The month end tooth  288  of the date indicator  220  is detached from the month feeding operation portion  270 C of the month feeding lever  270 . Due to the resilient force of the month feeding lever spring portion  270 D, the month feeding lever  270  moves away from the month wheel  242 . That is, the month feeding lever  270  moves toward the month indicator  240  based on the rotation of the date indicator  220 , and is restored to the former position by the resilient force of the spring portion of the month feeding lever  270 . 
     Referring to  FIG. 24 , the date feeding finger  212  has fed the date indicator tooth portion  226  of the date indicator  220  counterclockwise by only one tooth, and the date display is changed to “1st day.” Due to the movement of the month feeding lever  270  by the month end tooth  288  of the date indicator  220 , the month star tooth portion  246  of the month star  247  has been fed clockwise by only one tooth, and the month display is changed to “DEC.” The operations of date feeding and month feeding may be effected, for example, between 8 p.m. and 12 p.m. 
     The operation at the end of a “shorter month” other than “November” is the same as that at the end of “November.” The operation at the end of “February” is the same as the operation at the end of “November,” so that, at the end of “February” (on February 28 or February 29 in a leap year), it is necessary to effect date correction such that the date display is turned to “1,” which corresponds to “1st day” using the calendar correction mechanism. 
     (8) Operation of the Watch when the Winding Stem is at the 0th Step 
     Referring to  FIGS. 2 through 4  and  FIG. 27 , in the state in which the winding stem  110  is at the 0th step, the tooth B  114 B of the clutch wheel  114  is in mesh with the inner tooth  116 A of the winding pinion  116 . Thus, when the winding stem  110  is rotated to the right (i.e., when the winding stem  110  is rotated clockwise as seen from the outer side of the watch), the winding pinion  116  rotates based on the rotation of the clutch wheel  114 , and the crown wheel rotates. Based on the rotation of the crown wheel, the crown transmission wheel rotates. Through the rotation of the crown transmission wheel, the rocking crown wheel rocks while rotating and is engaged with the ratchet wheel, causing the ratchet wheel to rotate in a fixed direction. A click (not shown) is provided so as to prevent the ratchet wheel from rotating in the reverse direction. 
     A barrel arbor rotates based on the rotation of the ratchet wheel, winding up the mainspring. Due to the power of the mainspring, a barrel wheel rotates in a fixed direction. The front train wheel rotates based on the rotation of the barrel wheel, and the second hand and the minute hand constituting the time indicating members are rotated. The rotation speed of the front train wheel is adjusted by the governor device including the balance with hairspring and by the escapement device. Based on the rotation of the front train wheel, the back train wheel including the minute wheel and the hour wheel rotates, causing the hour hand to rotate. Further, based on the rotation of the back train wheel, the date feeding mechanism operates to rotate the date indicator  220 , and the month feeding mechanism operates to rotate the month indicator  240 . 
     (9) Operation of the Watch when the Winding Stem is at the 1st Step 
     (9.1) Date Correcting Operation: 
     Referring to  FIG. 4 , the winding stem  110  is pulled out by one step in the state in which it is at the 0th step, and the state in which the winding stem  110  is at the 1st step is attained. When the winding stem  110  is pulled out by one step, the setting lever  120  rotates counterclockwise, causing the yoke  122  to rotate clockwise. In this state, the tooth A  114 A of the clutch wheel  114  is in mesh with the setting wheel  128 , and the tooth B  114 B of the clutch wheel  114  is not in mesh with the inner tooth  116 A of the winding pinion  116 . 
     As described above, when the winding stem  110  is at the 1st step, the balance setting lever  170  is rotated clockwise by the setting lever  120 , and the rocking bar abutment portion of the balance setting lever  170  abuts the first correction transmission wheel shaft portion to thereby effect positioning. Due to the operation of the balance setting lever  170 , the rocking bar  130  rotates counterclockwise, and the second correction transmission wheel shaft portion abuts the cylindrical wall surface of the rocking bar positioning hole. In this state, the balance setting lever  170  does not come into contact with the balance with hairspring  210 . 
     When the winding stem  110  is rotated to the right (i.e., when the winding stem  110  is rotated clockwise as seen from the outer side of the watch), the setting wheel  128  rotates counterclockwise based on the rotation of the clutch wheel  114 . Based on the rotation of the setting wheel  128 , the first correction transmission wheel  132  rotates clockwise. Based on the rotation of the first correction transmission wheel  132 , the second correction transmission wheel  134  rotates counterclockwise. Based on the rotation of the second correction transmission wheel  134 , the third correction transmission wheel  140  rotates clockwise. Then, the rocking lever  142  rotates clockwise, and the correction wheel shaft portion abuts the cylindrical wall surface of the rocking lever positioning hole to thereby effect positioning. When, in this state, the winding stem  110  is rotated to the right, the third correction transmission wheel  140  can slip with respect to the rocking lever  142 . 
     Based on the rotation of the third correction transmission wheel  140 , the correction wheel  144  rotates counterclockwise at the position as shown in  FIG. 4 . Based on this rotation of the correction wheel  144   b , the date indicator  150  rotates counterclockwise. The position of the date indicator  150  in the rotating direction is determined by the date jumper  180 . As described above, in the watch of the present invention, the winding stem  110  is rotated to the right in the state in which the winding stem  110  is at the 1st step, thereby it is possible to effect date correction. 
     (9.2) Month Correcting Operation: 
     Referring to  FIG. 4 , in the state in which the winding stem  110  is at the 1st step, when the winding stem  110  is rotated to the left (i.e., when the winding stem  110  is rotated counterclockwise as seen from the outer side of the watch), the setting wheel  128  rotates clockwise based on the rotation of the clutch wheel  114 . Based on the rotation of the setting wheel  128 , the first correction transmission wheel  132  rotates counterclockwise. Based on the rotation of the first correction transmission wheel  132 , the second correction transmission wheel  134  rotates clockwise. Based on the rotation of the second correction transmission wheel  134 , the third correction transmission wheel  140  rotates counterclockwise. Then, the rocking lever  142  rotates counterclockwise, and the correction wheel shaft portion abuts the cylindrical wall surface of the rocking lever positioning hole to effect positioning. When, in this state, the winding stem  110  is rotated to the right, the third correction transmission wheel  140  can slip with respect to the rocking lever  142 . 
     Based on the rotation of the third correction transmission wheel  140 , the correction wheel  144  rotates clockwise. Based on this rotation of the correction wheel, the correction wheel  158  rotates counterclockwise. Then, based on the rotation of the correction wheel  158 , the month indicator  180  rotates clockwise. The position of the month indicator  180  in the rotating direction is determined by the month jumper  262 . 
     (10) Operation of the Watch when the Winding Stem is at the 2nd Step 
     Referring to  FIG. 4 , the winding stem  110  is further pulled out by one step from the 1st step to attain the state in which the winding stem  110  is at the 2nd step. When the winding stem  110  is further pulled out by one step, the setting lever  120  further rotates counterclockwise. During this operation, the yoke  122  does not rotate. Thus, in this state, in which the winding stem is at the 2nd step, as in the stage in which the winding stem  110  is at the 1st step, the tooth A  114 A of the clutch wheel  114  remains in mesh with the setting wheel  128 , and the tooth B  114 B of the clutch wheel  114  is not in mesh with the inner tooth  116 A of the winding pinion  116 . 
     When the winding stem  110  is at the 2nd step, through rotation of the setting lever  120 , the balance setting lever  170  is rotated counterclockwise, and the balance setting pin  170 A of the balance setting lever  170  abuts the outer periphery of the balance wheel portion of the balance with hairspring  210 , thereby stopping the rotation of the balance with hairspring  210 . As a result, the pallet fork  342  and the escape wheel &amp; pinion  330  do not operate, and the rotation of the second wheel &amp; pinion  442  is set, with the rotation of the second hand  460  being stopped. 
     The balance setting pin  170 A of the balance setting lever  170  may be formed by the end surface of the balance setting lever  170  or by bending the end surface of the balance setting lever  170  at right angles. Through rotation of the setting wheel  120 , the pin provided at the distal end portion of the setting lever  120  pushes the setting lever engagement portion  130 E of the rocking bar  130 . Then, the rocking bar  130  rotates clockwise, and the second correction transmission wheel shaft portion abuts the cylindrical wall surface of the rocking bar positioning hole. Then, the second intermediate minute wheel  162  is engaged with the minute wheel  166 . 
     When the winding stem  110  is rotated to the right (i.e., when the winding stem  110  is rotated clockwise as seen from the outer side of the watch), the setting wheel  128  rotates counterclockwise based on the rotation of the clutch wheel  114 . Based on the rotation of the setting wheel  128 , the first intermediate minute wheel  160  rotates clockwise. Based on the rotation of the first intermediate minute wheel  160 , the second intermediate minute wheel  162  rotates counterclockwise. Based on the rotation of the second intermediate minute wheel  162 , the minute wheel  166  rotates clockwise. Based on the rotation of the minute wheel  166 , the hour wheel  180  and the center wheel &amp; pinion  325  rotate counterclockwise. Thus, when the winding stem  110  is at the 2nd step, by rotating the winding step  110  to the right, it is possible to effect so-called “reverse hand matching.” 
     When the winding stem  110  is rotated to the left (i.e., when the winding stem  110  is rotated counterclockwise as seen from the outer side of the watch), the setting wheel  128  rotates clockwise based on the rotation of the clutch wheel  114 . Based on the rotation of the setting wheel  128 , the first intermediate minute wheel  160  rotates counterclockwise. Based on the rotation of the first intermediate minute wheel  160 , the second intermediate minute wheel  162  rotates clockwise. Based on the rotation of the second intermediate minute wheel  162 , the minute wheel  166  rotates counterclockwise. Based on the rotation of the minute wheel  166 , the hour wheel  250  and the minute wheel  260  rotate clockwise. Thus, when the winding stem  110  is at the 2nd step, by rotating the winding stem  110  to the left, it is possible to effect so-called “normal hand matching.” 
     By rotating the hour wheel  180 , it is possible to correct the “hour” display of the hour hand  464  mounted to the hour wheel  180 . By rotating a cannon pinion of the minute wheel  446 , it is possible to correct the “minute” display of the minute hand  462  mounted to the minute wheel  446 . And, due to the operation of the balance setting lever  170 , while the display of “hour” and “minute” is being corrected, the “second” display undergoes no change. 
     (11) Second Embodiment 
     Next, a second embodiment of the watch with a calendar mechanism of the present invention will be described. In the following, a difference between the second embodiment of the watch with a calendar mechanism of the present invention and the first embodiment of the watch with a calendar mechanism of the present invention will be mainly described. Thus, regarding the portions not described below, the description of those of the first embodiment of the watch with a calendar mechanism of the present invention applies here. The second embodiment of the watch with a calendar mechanism of the present invention is applied to an analog electronic watch. In the case in which the present invention is applied to an analog electronic watch, the construction and operation of the switching mechanism, the calendar feeding mechanism, and the calendar correction mechanism are the same as those of the first embodiment of the present invention described above. 
     Referring to  FIG. 28 , a movement  600  is formed by an analog electronic watch. The movement  600  includes a main plate  602  constituting the substrate of the movement. A dial (not shown) is mounted to the glass side of the movement  600 . A winding stem  610  is rotatably incorporated into the main plate  602 . The switching device includes the winding stem  610 , a setting lever (not shown), a yoke (not shown), and a yoke holder (not shown). A setting device includes a setting lever (not shown). In the movement  600 , a battery  640  constituting the power source of the watch is arranged on the case back side (front side) of the main plate  602 . In the movement  600 , it is desirable for the center of the battery  640  to be arranged between the “10 o&#39;clock direction” and the “2 o&#39;clock direction.” In the movement  600 , it is more desirable for the center of the battery  640  to be arranged between the “11 o&#39;clock direction” and the “1 o&#39;clock direction.” A quartz unit  650  constituting the oscillation source of the watch is arranged on the case back side of the main plate  602 . A quartz oscillator is accommodated in the quartz unit  650 . A motor drive portion (driver) outputting a motor drive signal to a step motor based on the oscillation of the quartz oscillator is contained in an integrated circuit (IC)  654 . 
     The quartz unit  650  and the integrated circuit  654  are fixed to a circuit board  610 . The circuit board  610 , the quartz unit  650 , and the integrated circuit  654  constitute a circuit block  612 . The circuit block  612  is arranged on the case back side of the main plate  602 . A battery negative terminal  660  is provided for the purpose of establishing conduction between the cathode of the battery  640  and the negative pattern of the circuit board  610 . A battery positive terminal  662  is provided for the purpose of establishing conduction between the anode of the battery  640  and the positive pattern of the circuit board  610 . A coil block  630 , a stator  632 , and a rotor  634 , which form the step motor, are arranged on the case back side of the main plate  602 . 
     Through rotation of the rotor  634 , a fifth wheel &amp; pinion  641  rotates. Through the rotation of the fifth wheel &amp; pinion  641 , a second wheel &amp; pinion  642  rotates. Through the rotation of the second wheel &amp; pinion  642 , a third wheel &amp; pinion  644  rotates. Through the rotation of the third wheel &amp; pinion  644 , a center wheel &amp; pinion (not shown) rotates. Through the rotation of the center wheel &amp; pinion, a minute wheel  648  rotates. Through the rotation of the minute wheel  648 , an hour wheel (not shown) rotates. An hour hand (not shown) is mounted to the hour wheel. The hour wheel makes one rotation in 12 hours. When the winding stem  610  is at the 0th step, and when the winding stem  610  is at the 1st step, the setting lever does not set the gear portion of the second wheel &amp; pinion  642  or the fifth wheel &amp; pinion  641 . When the winding stem  610  is at the 2nd step, the setting lever sets the gear portion of the second wheel &amp; pinion  642  or the fifth wheel &amp; pinion  641 . 
     The second wheel &amp; pinion  642  makes one rotation in a minute. The center wheel &amp; pinion makes one rotation in an hour. A slip mechanism is provided on the center wheel &amp; pinion. When the winding stem  610  is pulled out to the 2nd step for hand matching, the setting lever (not shown) sets the gear portion of the second wheel &amp; pinion  642  or the fifth wheel &amp; pinion  641  to stop the rotation of the second hand. A center pipe (not shown) is fixed to the main plate  602 . The center pipe extends from the case back side of the main plate  602  to the dial side of the main plate  602 . A train wheel bridge (not shown) rotatably supporting the front train wheel is arranged on the case back side of the main plate  602 . 
     On the back side of the movement  600 , two date indicator driving wheels are rotated through rotation of the hour wheel, making it possible to operate a date feeding mechanism (not shown) and a month feeding mechanism (not shown). As seen in a sectional view, the date indicator driving wheel (not shown) arranged on the back side of the movement  600  is preferably arranged so as not to overlap the battery  640  arranged on the front side of the movement  600 . The construction and operation of the date feeding mechanism and the month feeding mechanism are the same as the construction and operation of the date feeding mechanism and the month feeding mechanism of the first embodiment of the watch with a calendar mechanism of the present invention. Due to this construction, it is possible to realize an electronic watch with a calendar mechanism whose movement has a small thickness. 
     According to the present invention, it is possible to reduce the thickness of the date feeding mechanism and of the month feeding mechanism, making it possible to produce a watch with a calendar mechanism whose movement has a small thickness. Further, according to the present invention, it is possible to produce a watch with a calendar mechanism in which the operation of the date feeding mechanism and of the month feeding mechanism is stable. Further, according to the present invention, it is possible to produce a watch with a calendar mechanism in which no excessive load is applied to the transmission train wheel during usual date feeding.