The present invention concerns a holographic display device incorporated in a timepiece device comprising at least one movable hand, having a light source at its peripheral end, and a watch glass comprising at least one hologram at its periphery, said light source being arranged on the hand so that it reconstructs said hologram when it moves into a predetermined angular sector.

A timepiece movement, a calendar mechanism and device for indicating the sunrise and sunset that takes account of seasonal variations. The simple calendar mechanism includes a display mechanism for displaying the date and a display mechanism for displaying the month. The sunrise and sunset indicating device also includes an annual cam having a profile representative of the tilt of the sun with respect to the equatorial plane and arranged to be driven in rotation via the hour wheel set through a kinematic chain that passes through the month display device and has a transmission ratio of 1:744.

A timepiece includes a timepiece movement, a calendar mechanism and a mechanism for indicating the sunrise and sunset that take account of seasonal variations. The calendar mechanism includes a date display and a month display. The sunrise and sunset indicating mechanism also includes an annual cam having a profile representative of the tilt of the sun with respect to the equatorial plane and arranged to be driven in rotation by the date wheel set via a third kinematic chain.

The present invention concerns a holographic display device incorporated in a timepiece device comprising at least one movable hand, having a light source at its peripheral end, and a watch glass comprising at least one hologram at its periphery, said light source being arranged on the hand so that it reconstructs said hologram when it moves into a predetermined angular sector.

A timepiece movement, a calendar mechanism and device for indicating the sunrise and sunset that takes account of seasonal variations. The simple calendar mechanism includes a display mechanism for displaying the date and a display mechanism for displaying the month. The sunrise and sunset indicating device also includes an annual cam having a profile representative of the tilt of the sun with respect to the equatorial plane and arranged to be driven in rotation via the hour wheel set through a kinematic chain that passes through the month display device and has a transmission ratio of 1:744.

A timepiece includes a timepiece movement, a calendar mechanism and a mechanism for indicating the sunrise and sunset that take account of seasonal variations. The calendar mechanism includes a date display and a month display. The sunrise and sunset indicating mechanism also includes an annual cam having a profile representative of the tilt of the sun with respect to the equatorial plane and arranged to be driven in rotation by the date wheel set via a third kinematic chain.

A timepiece includes a first member for displaying a local time, a second member for displaying a GMT time, a drive wheel and pinion of the first display member, a first correction mechanism arranged to be able to be kinematically linked to the drive wheel and pinion to allow simultaneous correction of the local time and the GMT time, a second correction mechanism of the second display member, arranged to correct the GMT time independently of the local time, a drive mechanism of the second display member including a differential gear including a first input arranged to be kinematically linked to the drive wheel and pinion of the first display member, a second input arranged to be kinematically linked to the second correction mechanism of the second display member, an output arranged to drive the second display member, and a geartrain mounted in parallel with the drive mechanism.

A timepiece indicates the sunrise and sunset taking into account seasonal variations. The timepiece includes a sphere representing the Earth, a shell arranged concentrically to the sphere and arranged to delimit a part of the globe where it is night time from another part where it is daytime by indicating the position of the Earth's terminator. The shell can pivot around the globe along two perpendicular axes. The shell is driven by the movement in order to revolve at the rate of one revolution every 24 hours around the polar axis. A differential mechanism is controlled by a year cam that has a profile representing the inclination of the sun in relation to the equatorial plane. The differential mechanism controls the inclination of the shell around the axis by a drive shaft concentric to the polar axis.