Patent ID: 8830797

Claim:
A timepiece comprising an indicator dial, a days-of-the-month mechanism comprising a days-of-the-month mobile and a stepper drive member for driving the days-of-the-month mobile, a months mobile placed beneath said indicator dial and connected to the days-of-the-month mobile by stepper drive means formed so that the months mobile turns through an angle of 30° each month, wherein said indicator dial has twelve windows that are angularly equidistant, said months mobile supporting a distinctive zone of which the trajectory passes through said windows and of which the angular extent is situated between a minimum corresponding to the angular extent of one of said windows and a maximum of 30°, wherein said stepper drive means connecting the days-of-the-month mobile to the months mobile comprise a toothed sector and an intermediate mobile on the one hand, constantly engaged with a tooth gear secured to the months mobile which extends over 360° and, on the other hand, periodically engaged with said toothed sector.