Patent ID: 7321528

Claim:
A watch movement comprising an annular frame ( 10 ), of external diameter D, provided with a round central opening ( 48 ) defined by an internal diameter d and, borne by said frame: an energy source ( 16 ), a time base ( 18 ), a counting device ( 20 ) actuated in synchronization with the time base ( 18 ), a work train ( 26 ) actuated by said device ( 20 ), a motion work train ( 34 ), arranged to bear analog time display means ( 40 , 44 ), and correcting means ( 46 , 50 , 56 , 58 ) for the display means ( 40 , 44 ), characterized in that the motion work train ( 34 ) comprises a motion work mobile ( 36 ) containing a wheel ( 36 a ) and a pinion ( 36 b ), a cannon pinion ( 38 ) driven by the motion work wheel ( 36 a ) and intended to bear a minute hand ( 40 ), and an hour wheel ( 42 ) driven by the motion work pinion ( 36 b ) and intended to bear an hour hand ( 44 ), in that the cannon pinion ( 38 ) and the hour wheel ( 42 ) are concentric to the frame ( 10 ) and have a central opening substantially equal to d, and in that the work train contains a first mobile ( 28 ) provided with a spindle ( 28 c ) on which the motion work mobile ( 36 ) is friction-mounted.