Abstract: Wristwatch comprising a case (1) enclosing the watchmaking components and provided with a dial (10), a flexible strap (2) provided with rigid reinforcing elements (3) at the ends interacting with two opposite sides (5a, 5b) of the case, and a removable cover (4) mounted by slipping over the case (1), the cover being provided with a window (15) for the dial of the case and elastic locking components (16a, 16b) interacting with the case and the reinforcing elements (3) of the flexible strap (2) for mounting the cover on the case.

Abstract: A bracelet watch comprises a removable flexible bracelet (2), the ends (5) of which are reinforced by an elastic tubular blade (6) or a cylindrical jaw inserted into a sleeve (7) removably fitting into a drilling (13) made in one side (1a) of the case (1) of the watch. A pawl mechanism (11, 16) is fitted for this assembly system.

Abstract: A jewel is formed from a plurality of components and comprises two mutually complementary elements, one of which forms a base and the other an insert. Both elements are incurved and at least one is not completely closed. The base has at least one window which crosses it from the concave side to the convex side and the insert has at least one protuberance complementary to the window of the base. Assembly of the two elements by penetration of the protuberance into the window of the base necessitates an elastic deformation of at least one of the two elements. At least one of the elements is interchangeable, which allows the appearance of the jewel to be changed.