Year: Circa 2020
Reference No: 26586IP.OO.1240IP.01
Case No: RN2385H
Model Name: Royal Oak Perpetual Calendar Ultra-Thin
Material: Titanium and Platinum
Calibre: Automatic, cal. 5133, 37 jewels
Bracelet/Strap: Titanium and platinum Audemars Piguet bracelet, max length 190mm
Clasp/Buckle: Titanium and platinum deployant clasp
Accessories: Accompanied by Audemars Piguet fitted box, winder, warranty, product literature and outer packaging.

The Audemars Piguet ultra slim perpetual calendar features a cutting-edge movement in an iconic case. Based on the RD2 concept watch presented in 2018 the present timepiece is the world’s thinnest perpetual calendar with a case measuring a mere 6.3mm thick. The base movement is caliber 2120 that has been a staple in the Royal Oak collection since 1972 but has been reworked in this model. Dubbed cal 5133 it has less components than the caliber found in Audemars Piguet’s regular perpetual calendars (256 vs 374) and has been reworked with a redistribution of the components on a horizonal pane increasing the movements diameter to 32mm (vs 29mm). Furthermore, to reduce thickness to a bare minimum the perpetual calendar module has been re-engineered for sit on a flat pane. The case is light as made in titanium but features a polished platinum bezel and links. Separating the watch apart from other Royal Oak models the dial does not feature the signature Grande Tapisserie dial. The present watch is in almost unworn condition and is complete with its full set of accessories.