Patent ID: 8308345

Claim:
A wrist-watch, comprising: a dial; a base movement provided with at least one time indicator driven by a first barrel; a chronograph module provided with at least one indicator, both said indicators being visible on a same side of the wrist-watch; said chronograph module being exclusively composed of mechanical elements; said indicator of said chronograph module being driven by a second barrel; a power reserve indicator organ for indicating on the dial the power reserve of said second barrel said indicator being adapted for indicating to a user the power reserve available for powering a chronograph function of said watch, wherein: said base movement comprises a first regulator organ connected to a first wheelwork, to said first barrel and to said time indicator of the base movement, said chronograph module comprises a second regulator organ connected to a second wheelwork, to said second barrel and to said indicator of the chronograph movement, the second regulator being constantly engaged with the second wheelwork, the frequency of oscillation supplied by the second regulator being different from the frequency of oscillation supplied by the first regulator.