Royal Oak/ daydate moonphase
Steel & gold
Watch comes with certificate of authenticity by AP
The first Royal Oak watches with complications appeared in 1983. Their 36 mm diameter confirmed the new sizing standard.
Audemars Piguet first presented the Royal Oak Day Date, Model 5572, equipped with Calibre 2124/2810 (26 mm in diameter, 4.55 mm thick), followed by several derivatives numbered 5577, 5581 and 5584. The base movement blank was produced by Jaeger-LeCoultre, while the calendar plate was manufactured by Dubois Dépraz in the small village of Le Lieu in the Vallée de Joux. The development was carried out in Audemars Piguet's brand-new Technical Department, as evidenced by plans dating from 1982. The same applies to the Royal Oak triple calendar models equipped with Calibre 2124/2825, housed in a case identical to the first Day Date model. They were also available in several variants featuring a moon phase from 1983 onwards: 5658, 5595, 25594 and 25627.
This 36 mm diameter was used again ten years later for the first Royal Oak Dual Time, whose time-zone system was based on Audemars Piguet patent CH673196A. Equipped with Calibre 2129/2845 (26 mm in diameter, 4.85 mm thick), the first variations bore model numbers 25744, 25762, 25772 and 25730. They were followed by Models 25757 and 25929, both powered by Calibre 2229/2845. Finally, the Royal Oak with annual calendar (Model 25920, Calibre 2224/2814) adopted the same size in 1999.