Montres Rolex S. A.

Jean-Pierre Hagmann

The invention concerns an unfolding bracelet clasp, in particular a watch bracelet, formed of two strands (A) and (B), comprising a metal plate ( ) whereof one end is coupled with an articulation ( ) at the bracelet strand (A) free end and a lever ( ) whereof the pin ( ) is mounted at the plate ( )other end. Said lever ( ) comprises a U-shaped part whereof the legs extend on each side of the bracelet forming at their ends hooks ( ) designed to be urged in engagement, when the bracelet is closed, with the ends of a spring box axle ( ) transversely housed in the bracelet strand (A) at some distance from the articulation ( )substantially equal to the plate ( ) length. The length of the bracelet is adjusted by a dog point ( ) engaged in a suitable hole of the bracelet strand (B).

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Genève, Switzerland

Jean-Pierre Hagmann