Abstract: A chronometer having a tide grid comprising a contour line indicating at least one complete tide cycle and a superposed reading grid comprising at least one read-off reference mark. One of the grids is driven in rotation at a constant angular speed about an axis. The grids are concentric about that axis and the read-off reference mark is radially disposed relative to that axis The contour line indicates tides on polar coordinates such that the distance of a point on the contour line from that axis indicates the height of the tide. The radial read-off reference mark intersects the contour line at a point which indicates the height of the tide for the time shown by the chronometer for a specific geographical location.

Abstract: Apparatus comprising a dial provided with distinct zones formed by crown sectors 2.1, 2.2 and 2.3 which are adjustable in function of a manual correction device respectively of a selecting device.

Abstract: Watch with moon phases indicator constituted by a moon phases indicating member (14) partly appearing through the moon wicket (13A) of a moon phases indicating member (13) in such a way that it represents the shape of the moon as a function of the quarter which it occupies relative to the time displayed by the hour indicating members.

Abstract: The back cover (51) of the watch case carries a middle-bezel and forms a plate. At its center there are superimposed and concentrically pivoted, respectively, a ratchet crown-wheel (1.6) inside which a mainspring is housed, driving a core (1.3) fast with an hour-disc (1.1) comprising a toothing on its periphery, and a transparent minute-disc (1.2) comprising also a toothing on its periphery. These discs mesh on the one hand with a drive train (2, 3, 4) by which the minute-disc is driven by the hour-disc and, on the other hand with a winding and time-setting mechanism both located outside of the discs and at least partially at the same height as these discs.

Abstract: A timepiece including a casing having a main part with an element in relief to receive the timepiece movement. The casing element supports at least a part of the shafts of the timepiece movement gearing. The element has at least one bridge of the movement frame to maintain the gearing with at least one other bearing surface for another element of the movement.