A window into the beating heart of the legendary El Primero

The CHRONOMASTER Open offers a view of the beating heart of the El Primero movement from the dial. Crafted in a sleek 40mm steel case, this version features a matte black dial with tricolour counters and a transparent counter for the running seconds, paired with a black cordura-effect rubber strap. Powered by the El Primero 3604 1/10th of a second automatic chronograph movement.