Chronograph with two rotational directions

A chronograph including a device for driving a second counter by a first counter, said second counter being arranged for counting the revolutions made by said first counter from a zero position of said first counter, said drive device including a control finger mounted on said first counter and capable of meshing with a transmission wheel associated with said second counter,

• wherein said first and second counters are capable of rotating in both directions, respectively in an adding mode and in a countdown mode, said second counter being driven forwards or backwards depending on the rotational direction of said first counter, wherein said control finger is mounted so as to pivot on a disc linked to a rotating shaft of said first counter and wherein said disc and said control finger are coupled to each other by drive means enabling said control finger to pivot on said disc between two stop positions set apart by an angle close to 360°.