CHRONOMASTER OPEN | 39.50 mm | AutomaticThe 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 silver dial with tricolour counters and a transparent counter for the running seconds, paired with a blue cordura effect rubber strap. Powered by the El Primero 3604 1 10th of a second automatic chronograph movement.
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