Combine the iconic and forward-looking design of Gerald Genta with Audemars Piguet’s mastery of haute horlogerie and you get this insane Quantième Perpétuel Royal Oak.

The first Royal Oak to feature a perpetual calendar complication, the reference 5554, was released in 1983 and its descendants have been in production ever since.

This 25820ST from 2004 features the iconic 39mm stainless steel octagonal case and integrated bracelet, designed by the legendary Gerald Genta. The exquisite hand finished automatic movement with skeletonized 21k white gold rotor is visible through a sapphire caseback.

The matching silver-colored dial does not feature the characteristic tappisserie engraving but has a smooth brushed finish, ceding all attention to the beautiful sub-dials. The calendar complications (day, month, and date) are displayed in the three upper subdials, whereas the smaller dial at the 6 o’clock position displays a lovely moonphase indicator alongside the Audemars Piguet signature. A cool detail on the 25820 is that it’s the first regular production perpetual calendar Royal Oak to display the leap-year indicator on the dial (here in the sub-dial at the 12 o’clock position).
The watch is in amazing condition with sharp bevelled edges and comes with the original box and papers.