Patent ID: 7473027

Claim:
A watch comprising: (a) a movement that includes a constant force device inserted in a going train connecting a spring barrel to an escapement having an escapement wheel and including a third wheel that completes one revolution in several minutes and drives a seconds pinion completing one revolution per minute, the constant force device including i. an input element; ii. an output element coaxial to the input element and mechanically connected to a star wheel with several branches; iii. a spiral spring resiliently connecting the input element to the output element in rotation and a stop train meshed with a stop element and provided with a stop wheel having at least one finger arranged to abut against one branch of said star wheel, wherein said third wheel is an output third wheel that is the output element of said constant force device and the input element of the constant force device is formed by an input third wheel, and wherein said output third wheel meshes with said seconds pinion that meshes in turn with an escapement pinion; and (b) an independent minutes display with a minute hand driven by the going train, the number of branches of the star wheel being equal to the number of minutes during which the star wheel completes one revolution, such that the rotation of the star wheel releases the stop train and the input third wheel once per minute.