Audemars Piguet Selfwinding Chronograph

Audemars Piguet's Royal Oak Selfwinding Chronograph 26331ST.OO.1220ST.02 measures 41 mm across in steel. The case is 11 mm thick and pairs with a sapphire crystal over a black dial. Inside is the self-winding Calibre 2385, a chronograph movement that also handles small seconds and date. As a chronograph, it carries the Royal Oak's familiar combination of stopwatch function and clean sub-dial layout, with a date window set into the design. The steel bracelet closes with an AP folding clasp. Water resistance sits at 50 metres, adequate for daily wear rather than diving.