A timepiece having multiple springs while reducing the plane size of the movement. The timepiece has a first barrel including a first barrel arbor, a first spring, and a first barrel wheel; and a second barrel including a second barrel arbor, a second spring, and a second barrel wheel, disposed to a position not superimposed with the first barrel in a plan view from the axial direction of the first barrel arbor and the second barrel arbor, and having rotation of the first barrel transferred thereto; a planetary gear mechanism having a display pivot that turns in a first direction when rotation of the first ratchet wheel that turns in unison with the first barrel arbor is transferred, and turns in a second direction opposite the first direction when rotation of the second barrel wheel is transferred, and is disposed to a position not superimposed with the first barrel and the second barrel in plan view; and a power reserve wheel train including multiple wheels that transfer rotation of the first ratchet wheel to the planetary gear mechanism, and having one of the multiple wheels axially supported by the second barrel arbor.

A date calendar display mechanism driven via a kinematic chain by a horological movement of a timepiece. A first and second date indicators, the first date indicator remaining still during a 24-hour period separating the passage from the last day of a month having 31 days to the end of the first day of the following month, the kinematic chain including a wheel continuously engaged with the horological movement and having a toothing via which the wheel meshes with a pinion which contributes to driving the first indicator, the wheel being, at one point, devoid of teeth such that, during the above 24-hour period, the wheel does not mesh with the pinion and remains still. A dual jumper pivots about an axis with a first beak via which it is engaged with a toothing of the first date indicator and, at a second beak via which it is engaged with a toothing of the pinion, the dual jumper being elastically held engaged with the first date indicator and with the pinion.

A fastening method is for fastening at least one display element of a watch using a fastening device. Indeed, the at least one display element is fastened thanks to the fastening method via the fastening device. For this, it is necessary to provide the at least one display element, at least one movement, and at least one split ring, then to deform the at least one split ring so as to adapt to the at least one display element before fastening the at least one split ring with the at least one display element to the at least one movement.

A fastening method is for fastening at least one display element of a watch using a fastening device. Indeed, the at least one display element is fastened thanks to the fastening method via the fastening device. For this, it is necessary to provide the at least one display element, at least one movement, and at least one split ring, then to deform the at least one split ring so as to adapt to the at least one display element before fastening the at least one split ring with the at least one display element to the at least one movement.

A watch includes a case, and a solar cell disposed inside the case and including a substrate made of resin and having a surface, a power generating unit having, at the surface, a first electrode, a first semiconductor layer, and a second electrode that are stacked in order, a first antenna including a third electrode that is provided at the surface and that is disposed at a position not to overlap the power generating unit in a plan view viewed in a direction orthogonal to the surface, and a protective layer disposed covering the power generating unit and the first antenna.

A watch includes a case, and a solar cell disposed inside the case and including a substrate made of resin and having a surface, a power generating unit having, at the surface, a first electrode, a first semiconductor layer, and a second electrode that are stacked in order, a first antenna including a third electrode that is provided at the surface and that is disposed at a position not to overlap the power generating unit in a plan view viewed in a direction orthogonal to the surface, and a protective layer disposed covering the power generating unit and the first antenna.

A timepiece including at least analogue time display device, and an AM-PM display device for displaying day-night information in the dial of the timepiece. The AM-PM display device includes at least two apertures made in the dial of the watch, a rotating display disc bearing at least one first series of inscriptions corresponding to the day and at least one second series of inscriptions corresponding to the night, these two display series being disposed on at least two concentric circles, and a drive mechanism arranged so as to automatically and alternately bring the first series of inscriptions inside a first aperture and the second series of inscriptions inside a second aperture by rotating the display disc.

Provided is a calendar allowing a user to easily read the display for a particular day. A calendar 10 includes a day-display section displaying a day. The day-display section has a plurality of arc figures 28(1) to 28(5), each of which has an arc centered on a vertex of a polygon. The day is sequentially and continuously displayed along the plurality of arc figures.

An analogue information display system for a watch provided with a mechanical movement includes a display dial including a plurality of apertures, a moving display part supporting graphical representations, disposed in such a way that the graphical representations supported thereby appear in the plurality of apertures in order to generate the information, and an indicator member configured so as to designate a piece of information generated in an aperture to be notified to the wearer of the watch.

An analogue information display system for a watch provided with a mechanical movement includes a display dial including a plurality of apertures, a moving display part supporting graphical representations, disposed in such a way that the graphical representations supported thereby appear in the plurality of apertures in order to generate the information, and an indicator member configured so as to designate a piece of information generated in an aperture to be notified to the wearer of the watch.