Patent ID: 8483015

Claim:
A timepiece including an AM/PM display disc, rotating in twenty-four hours about an axis of rotation and including a graphic display comprising a first surface and a second surface, which are juxtaposed, joined and of similar shape, wherein said timepiece includes a movement arranged to drive a twenty-four hour wheel, and wherein said first surface includes a first decoration that corresponds to daytime, and said second surface has a second decoration that corresponds to night-time and is different from said first decoration, wherein said first surface and said second surface are delimited, between a hub centred on said axis of rotation and the periphery of said disc, by a first boundary curve and a second boundary curve each substantially tangential to said periphery and each having a single concavity from said periphery towards said hub, the concavities of said first boundary curve and said second boundary curve having the same direction relative to the direction of rotation of said disc, and any radial line originating from said axis of rotation intersecting, in succession, first one of said first and second surfaces, then the other, and only passing through one of said boundary curves between said hub and said periphery, and wherein said graphic display is rotating in twenty-four hours.