This micro mechanical marvel in yellow gold displays the grand alliance of high end mechanical horology with innovative extra thin watch making technology and traditional open working art craft. The extra thin movement of this timepiece, the hand-wound calibre 2924 that measures 4.40 mm thickness, offers a power reserve up to 70 hours.

The Audemars Piguet Royal Oak Tourbillon Extra-Thin Openworked, 41 mm features a slate grey open-worked dial with yellow gold applied hour-markers and Royal Oak hands with luminescent coating.
A spectacular tourbillon complication is placed at 6’o clock of the open worked dial. This timepiece completes with an 18-carat yellow gold bracelet with folding clasp. The movement details can also be admired through the sapphire crystal caseback.
Technical details
Model: Audemars Piguet Royal Oak Tourbillon Extra-Thin Openworked Yellow Gold Edition 41mm
Reference: 26513BA.OO.1220BA.01
Movement
Hand-wound Manufacture Calibre 2924
Total diameter: 31.50 mm (14 lignes)
Total thickness: 4.46 mm
Number of jewels: 25
Number of parts: 216
Minimal guaranteed power reserve: 70 h
Frequency of balance wheel: 3 Hz (= 21,600 vibrations/hour)
Functions
Tourbillon
Power reserve
Hours
Minutes
Case
18-carat yellow gold case, glare-proofed sapphire crystal and caseback, water-resistant to 20 m
Dial
Slate grey openworked dial, yellow gold applied hour-markers and Royal Oak hands with luminescent coating.
Bracelet
18-carat yellow gold bracelet with AP folding clasp
[…] 40th anniversary and was originally available only in platinum, followed by the launch of a yellow gold version in […]