Description
ZENITH Chronomaster Open El Primero 3604 Automatic Chronograph 39.5mm Watch book appointment Dial Size: 34 3600655 Dial Size: 34 Case Back: A transparent case back crafted from sapphire crystal showcases the intricate details of the movement The CHRONOMASTER Open offers a view of the beating heart of the El Primero movement from the dial Powered by the El Primero 3604 1 10th of a second automatic chronograph movement