Corum Admiral’s Cup Seafender 48 Deep Dive Ti/PVD/AuLimited Edition of 100 Pieces The case, in titanium black PVD, measures 48mm . The bezel is done in 18kt rose gold. It has an AR-coated sapphire crystal and is water resistant to 1,000 meters. It features a HEV valve. Movement is the Swiss automatic Corum caliber CO947, which is COSC-certified as a chronometer. It has 24 jewels, 28,800 vph and a power reserve of 42 hours.