Automatic mechanical chronometer movement, Caliber Zenith El Primero 4052 B, featuring a date function and central hour, minute, second hands. Analog dial with silver sunray finish, luminous silver-tone hands, index hour markers, minute and tenths of minutes indicators, fixed stainless steel bezel, scratch-resistant sapphire crystal, transparent case back, round case shape, 42 mm diameter, 13.5 mm thickness, black rubber strap measuring 18/21 mm width equipped with deployment clasp. Water resistant up to 100 meters (330 feet).