Audemars Piguet Selfwinding "50th Anniversary"

Audemars Piguet's Royal Oak Selfwinding "50th Anniversary", reference 15551ST.ZZ.1356ST.03, has a 37 mm steel case. The case measures 9.1 mm thick and carries a sapphire crystal over a grey dial. The watch is set with diamonds, adding sparkle to the tone-on-tone design. Inside runs the self-winding calibre 5900, showing hours, minutes, centre seconds and the date. This is a women's watch built on the current Royal Oak architecture. It comes on a steel bracelet fitted with an AP folding clasp. The clasp secures a case that is water resistant to 50 metres.