ETA caliber C51-1

Movement: DAMASKO chronograph movement C51-1, self-winding, mechanical movement, seconds stop function, 27 ruby bearings, 28,800 half oscillations/ hour, shock-proof according to DIN 8308, anti-magnetic according to DIN 8309 Functions: Hour, minute Chronograph: 60-minute counter from the middle, 60-seconds counte