Audemars Piguet Selfwinding Chronograph "50th Anniversary"

Audemars Piguet's Royal Oak Selfwinding Chronograph "50th Anniversary", reference 26240ST.OO.1320ST.02, has a steel case measuring 41 mm across and 6.8 mm thick. The case is steel throughout, paired with a black dial. Inside is the self-winding calibre 4401, viewed through a sapphire crystal on the front. As a chronograph, it carries a flyback function along with small seconds and date, set against the case's slim proportions. The dial itself is finished in black. The steel bracelet closes with an AP folding clasp, matching the case in material and finish. Water resistance is modest for the collection: the case holds up to 50 metres.