Patent ID: 8284632

Claim:
A calendar mechanism equipped timepiece which displays the date with two date indicators, comprising: a drive mechanism for driving the calendar mechanism equipped timepiece; time display wheels which rotate by means of the operation of the drive mechanism and display time information; a first date indicator which displays the ones column of the date; a second date indicator which displays the tenths column of the date; and a program wheel configured so as to enable each of the first date indicator and second date indicator to rotate intermittently based on the operation of the drive mechanism, wherein the program wheel includes: program wheel teeth for receiving the operation of the drive mechanism and advancing the program wheel; first date indicator advance teeth configured so as to advance the first date indicator; second date indicator advance teeth which can advance the first date indicator, and have provided at the leading ends thereof second date indicator advance fingers for advancing the second date indicator; and correction teeth configured so as to be unable to advance the first date indicator and unable to advance the second date indicator, wherein the first date indicator advance teeth, second date indicator advance teeth, and correction teeth are disposed on the outer side of the program wheel, the height of the second date indicator advance teeth is configured so as to be greater than the height of the first date indicator advance teeth, and the height of the first date indicator advance teeth is configured so as to be greater than the height of the correction teeth, the program wheel teeth for advancing the program wheel are provided on the program wheel as internal teeth, and the first date indicator and second date indicator, whose perimeters are positioned in proximity to each other, are configured so that it is possible to display information relating to the date with one of first date characters provided on the first date indicator and one of second date characters provided on the second date indicator.