Abstract: Watch case comprising an unfolding clasp for a flexible strap, with the unfolding clasp comprising: a middle connected to a first end of the strap, a base connected to the second end of the strap, an extension, connected in articulated fashion to the middle and to the base. The articulations between the middle and the extension and between the base and the extension are arranged in such a manner as to allow the middle, the extension and the base to superimpose in folded position, and to be juxtaposed in an unfolded position. The watch case further comprising a regulating cam for holding by compression and/or friction the strap against the base, the cam being capable of being swung to increase or reduce in a reversible manner the length of the strap in folded position.

Abstract: Watch case comprising an unfolding clasp for a flexible strap, said unfolding clasp comprising: a middle (1) connected to a first end of the strap, a base (3) connected to the second end of the strap, an extension (2), connected in articulated fashion to the middle (1) and to the base (3), wherein the articulations (20, 21) between the middle (1) and the extension (2) and between the base (3) and the extension (2) are arranged in such a manner as to allow the middle, the extension and the base to superimpose in folded position, and to be juxtaposed in unfolded position, a regulating cam (34) for holding by compression and/or friction the strap against the base, the cam being capable of being swung to increase or reduce in a reversible manner the length of in folded position of the strap.

Abstract: Reversible watch, comprising a case (1) provided with a first face (10) for displaying first time indications and a second face (11) opposite said first face. A turning-over mechanism (20, 21, 22, 23) allows the case (1) to be turned over around a turning-over axis (201-211; 221-231) parallel to the 6 o'clock-12 o'clock axis so as to display at the wearer's preference either the first face or the second face. The turning-over mechanism comprising a pivoting arm (20, 21; 22, 23) on each side of the case that allows the turning-over axis to be moved back. The case (1) is connected with the arms (20, 21; 22, 23) to be able to pivot around the turning-over axis (201-211; 221-231). The length of the arms is sufficient for turning over the case without the winding button or other buttons coming into contact with other parts (17) of the watch.