SIHH 2012: Openworked Extra-Thin Royal Oak Tourbillon 40th Anniversary Limited Edition Watch by Audemars Piguet

The legendary collection of Royal Oak celebrates its 40 years this year.
The company Audemars Piguet, which released the first wrist sporty watch in luxury category, has celebrated its anniversary by the release of limited edition – a collection of Openworked Extra-Thin Royal Oak Tourbillon 40th Anniversary Limited Edition. This collection combines the story of skill, daring and superior accuracy.
In 1972, a specialist in the design of fine mechanisms Piguet chose this complication for Royal Oak watch. The famous Calibre 2121 then became one of the thinnest automatic mechanisms of the watch world, the thickness of which was only 5.3 mm. However, the model developers did not stop and presented the skeletonized model, completed with a tourbillon, which became a sensation in 1986.
Over forty years on the watch market the Royal Oak watch did not lose its freshness, originality and masterly performed as exterior design and technical component.
The Openworked Extra-Thin Royal Oak Tourbillon 40th Anniversary Limited Edition (Ref: 26511PT.OO.1220PT.01) watch is performed on the basis of the manufacturing movement Calibre 2924 with manual winding and tourbillion, the overall diameter of which is 31.50 mm (14 lines), thickness - 4.46 mm , the number of jewels - 25, details -216. The watch power reserve is 70 hours, the frequency of balance - 21,600 vph.
41- mm case is made of 950 platinum, an antiglare sapphire crystal. The watch water resistance is 50 meters. The skeletonized dial is made of gray slate, in harmony with the applied time indices of white gold. Hands of the watch are made with fluorescent coating. The bracelet of the model is also made of platinum 950 and equipped with a company’s clasp AR.