The CHRONOMASTER Open offers a view of the beating heart of the El Primero movement from the dial. Crafted in a sleek 39.5mm steel case, this version features a matte black dial with tricolour counters and a transparent counter for the running seconds, paired with an integrated steel bracelet. Powered by the El Primero 3604 1/10th of a second automatic chronograph movement.
ZENITH CHRONOMASTER CHRONOGRAPH 1/10TH OF SECOND AUTOMATIC OPEN BLACK DIAL
El Primero movement269 components
36,000 VpH (5 Hz) frequency
Approx. 60 hours power
1/10th of a second Chronograph:
Central chronograph hand that makes one turn in 10 seconds
60-minute counter at 6 o'clock
60-second counter at 3 o'clock
39.5 mm stainless steel case
10 ATM water resistance
Black matte with two different-coloured counters & an Hesalite counter
Stainless steel bracelet