Audemars Piguet Royal Oak RD#2 – The World’s Thinnest Self-Winding Perpetual Calendar Watch

It took 5 years of research and development for Audemars Piguet to create the new ultra-thin 5133 calibre, the beating heart of the Royal Oak RD#2 self-winding perpetual calendar watch unveiled at SIHH 2018 haute horlogerie exhibition.

For this extremely slim perpetual calendar watch, the engineers and watchmakers from Audemars Piguet have re-engineered a three-storey movement into a single level, making it ultra-thin while combining and re-arranging functions to boost ergonomy, efficiency and robustness. This patented system features a 2.89mm central rotor.

This new movement boasts 40-hour power reserve, and same frequency (2.75Hz / 19’800 vibrations per hour) as calibre 5134.

This record breaking perpetual calendar watch comes dressed in a 950 platinum case and bracelet. The watch boasts a “Grande Tapisserie” pattern blue dial featuring improved readability with expanded counters and a night and day indication.

At just 6.30mm, the redesigned case shaves almost 2mm off the Royal Oak Extra-Thin Jumbo, making the Royal Oak RD#2 the thinnest self-winding perpetual calendar on the market today. The 12 o’clock moon phase of the new ultra-thin watch pays homage to the company’s first Perpetual calendar wristwatch that came out in 1955.

Technical details

Self-winding Manufacture Calibre 5133
Total diameter 32.00mm (14 ¾ lignes)
Total thickness 2.89mm
Number of jewels 37
Number of parts 256
Minimal guaranteed power reserve 40h
Frequency of balance wheel 2.75Hz (=19,800 vibrations/hour)

950 platinum case, glare-proofed sapphire crystal and caseback, water-resistant to 20m, RD#2 engraved on the caseback

Blue dial with “Grande Tapisserie” pattern, blue counters, white gold applied hour-markers and Royal Oak hands with luminescent coating

950 platinum bracelet with AP folding clasp

Perpetual calendar with day, date, astronomical moon, month, leap year, night and day indication, hours and minutes


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