DEFY EXTREME DIVER | 42.50 mm | AutomaticExplore new depths with the DEFY Extreme Diver by ZENITH, a black, titanium watch for professional divers with the El Primero 3620 SC movement. The DEFY Extreme Diver in a 42. 5mm angular case is crafted in titanium, equipped with a rotating black ceramic bezel and helium escape valve with a water resistance of 60 ATM (600 metres). Featuring black star patterned dial with luminescent markers and hands. Powered by the El Primero 3620 SC automatic