Audemars Piguet Selfwinding Chronograph

Audemars Piguet's Royal Oak Selfwinding Chronograph 26240ST.OO.1320ST.06 has a steel case measuring 41 mm across and 6.8 mm thick. The self-winding calibre 4401 drives the watch, an in-house movement built for this generation of the collection. The black dial sits under a sapphire crystal. As a chronograph, it uses a flyback function, a mechanism that resets and restarts the timer in one motion, and the layout also includes small seconds and a date window. A steel bracelet closes with an AP folding clasp. The case carries a 50 metre water resistance rating, enough for everyday wear and incidental splashes rather than diving.