Reverso Gran’Sport Chronograph 295.8.59

Gran’Sport chronographChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display. with retrogradeRetrograde handA hand that travels along an arc, then jumps back to its starting point when it reaches the end. 30-minute totaliserTotaliserA chronograph counter that accumulates elapsed minutes or hours as the chronograph seconds hand completes its revolutions., calibreCaliberThe designation of a watch movement, identifying its design or movement family. 859 derived from the 829, hidden under the reverse dial.