Patent ID: 8807828

Claim:
A timepiece including a plate and a barrel mounted on an element of the frame, said barrel comprising a drum including a bottom and side walls, a barrel arbor passing through center of the drum and equipped with pivot means for pivoting on the element of the frame, a strip-spring housed in the drum and cooperating by a first end with the barrel arbor and by a second end with the drum, and a cover passed through by the barrel arbor and closing said drum, a ratchet wheel being kinematically connected to the barrel arbor for winding of said spring, wherein the barrel arbor is mounted flying so that the barrel arbor is only pivoted by one end of the barrel arbor, using a bearing including three coplanar rings, whereof one ring among the intermediate and outer rings is fastened to an element of the frame, the other ring among the intermediate and outer rings is fastened to the bottom of the drum, and the inner ring is fastened to the barrel arbor.