Audemars Piguet Diver

Audemars Piguet's Royal Oak Offshore Diver 15720ST.OO.A355CA.01 has a 42mm steel case with a thickness of 14.2mm. The black dial sits behind a sapphire crystal and shows a date window along with a central seconds hand. Power comes from the self-winding Calibre 4308. Dive time measurement is part of the package, in keeping with the watch's role as a dive watch. The strap is turquoise rubber, fitted with a stainless steel pin buckle for a contrast against the black dial. Rated to 300 metres, the case is built for genuine underwater use rather than just show.