Chronograph mechanism and horology movement comprising such a chronograph mechanism

A chronograph mechanism for a horology movement comprising a first chronograph counter wheel secured to a first zero reset organ, a second chronograph counter wheel secured to a second zero reset organ, not coplanar with the first zero reset organ, the chronograph mechanism comprising a zero reset mechanism comprising:

• a first hammer and a second hammer configured on two levels to respectively engage with the first zero reset organ and the second zero reset organ;
• the first hammer and the second hammer pivoting separately relative to each other;
• a resilient coupling organ, arranged between the first hammer and the second hammer, comprising a first bracket bearing on the first hammer and a second bracket bearing on the second hammer to elastically restrain the second hammer against the first hammer, so that the first hammer is rotationally coupled with the second hammer when no stress greater than a value predetermined by the stiffness of the resilient coupling organ is applied to the second hammer.