Audemars Piguet Selfwinding "50th Anniversary"

Audemars Piguet's Royal Oak Selfwinding "50th Anniversary", reference 15550ST.OO.1356ST.04, measures 37 mm in steel. The case stands 8.9 mm thick. A sapphire crystal covers the blue dial, which carries hour and minute hands with a central seconds display. The self-winding calibre 5900 powers the watch and also drives the date function. This reference marks the Royal Oak's fiftieth anniversary with an updated design treatment on the familiar case. A steel bracelet with an AP folding clasp completes the piece. The clasp secures a case that holds its water resistance to 50 metres.