Abstract: Clockwork movement for a wristwatch, comprising a kinematic chain including at least one belt (20, 21) for transmitting the movements and/or couples between at least two pulleys. The pulleys are held on the bottom plate or the bridges by ball bearings (151, 161, 171, 181). The movement is rewound by means of linear oscillating mass (14) charging four barrels (15, 16, 17, 18) through a couple distributor (40). The barrels are non-parallel to one another. The back cover is covered by inclined glasses (110, 120, 130) allowing the barrels, the linear oscillating mass and at least certain pulleys to be seen. The regulating organ (51) is removable.

Abstract: Wristlet clasp allowing the wristlet length to be finely adjusted. A wheel accessible through an opening in the cover can be made to rotate to screw or unscrew a threaded rod so as to move an end of the wristlet relative to the cover.

Abstract: The invention relates to a chronograph watch with a display with a first retrograde hand for indicating the tenths of a second of the chronograph and a second retrograde hand for displaying the hundredths of a second of the chronograph. The hours, minutes and seconds are displayed by corresponding hands at the center of the dial.

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 provided with a multifunctional aperture display capable of displaying symbols corresponding to one or several special functions and to the date. The movement of the display discs is ensure by bidirectional motors and the display discs or mobiles have several series of digits of different colour for differentiating the display of the different functions.

Abstract: It is disclosed a stop watch (1) including a time indicator comprising a hand (2), a first scale (31) and a second scale (41). A part of a time indication is shown by the hand (2) on the first scale (31) and a second part of said time indication is shown by said second scale (41) in combination with said first scale (31). The first scale (31) is fixed and said second scale (41) is movably mounted around said first scale (31). The first part of said time indication corresponds to seconds of a duration counted by said stop watch (1), and the second part of said time indication corresponds to tenths of seconds of said duration.

Abstract: Method for switching the time zone indicated by a timepiece (1) in order to switch from an initial time zone to a modified time zone, having the following steps: the user enters a time switch command (268) by means of the crown, the hours' and minutes' hands indicate the time of the modified time zone (274), whilst the seconds' hand indicates a city corresponding to the selected time zone, the timepiece automatically returns (280) to the initial time zone and indicates the time of the initial time zone (202), or the time of the modified time zone is retained by means of a command from the user.