Audemars Piguet Selfwinding Flying Tourbillon "50th Anniversary"

Audemars Piguet's Royal Oak Selfwinding Flying Tourbillon "50th Anniversary", reference 26730ST.OO.1320ST.01, has a 41 mm steel case. The dial is blue with the "Grande Tapisserie" pattern and sits under a sapphire crystal. The self-winding calibre 2950 drives the watch, combining hours and minutes with a flying tourbillon. Without an upper bridge to the carriage, the tourbillon sits open to view on the dial side, turning through its rotation once a minute. The steel bracelet closes with an AP folding clasp, matching the case in finish. Water resistance is rated to 50 metres, modest for a piece built around such a delicate complication.