Patent ID: 7651259

Claim:
A timepiece including: (a) a case and a crystal together defining a housing for a movement; and (b) an element that is mobile in rotation actuated by a control member including i. a stem with a longitudinal axis passing radially through said case; ii. a crown mounted on a first proximal end of said stem; and iii. a pinion fixedly mounted in rotation on a second distal end of said stem during operation of said timepiece, wherein said control member is fitted with a securing part that axially secures said pinion on said stem, wherein said securing part is arranged on a proximal side of said stem, and said securing part includes (1) a first slit ring mounted so as to be locked axially and radially on the pinion of the element; and (2) means for axially locking the stem of the element, wherein the means for axially locking the stem of the element is secured to said slit ring.