Audemars Piguet Royal-Oak Annual Calendar Blue Dial with AP service Invoice ref. 25920ST

We have a real soft spot for Royal Oak models with added complications, and this superb example delivers with an annual calendar—or, in Audemars Piguet’s own words, the “Quantième Annuel.” This specific reference was introduced in 1999 and discontinued just a few years later, making it a relatively short-lived and increasingly collectible Royal Oak.

 

The 36 mm stainless steel case is in exceptionally sharp condition, complete with the side correctors used to adjust the annual calendar. The integrated bracelet is equally impressive, currently fitting wrists up to 18 cm, and remains in outstanding condition—just look at it !

 

The blue Grande Tapisserie dial is superb, featuring a peripheral date display around the outer edge and a distinctive month indicator sub-dial at five o’clock, displayed in French. The annual calendar correctly differentiates between months with 30 and 31 days, requiring adjustment only once per year on March 1st. A red date hand and red typography for the 31-day months add a welcome pop of color and enhance the dial’s visual impact.

 

This very cool Royal Oak is accompanied by a service invoice dated March 2025 from Audemars Piguet headquarters and benefits from factory service warranty coverage through March 2027.

 

We’re big fans of these mid-sized Royal Oaks and are always on the hunt for exceptional examples. This one truly stands out and brings a little extra kick for the discerning collector, let' talk !

 

Specifications:

 

• Audemars Piguet Royal Oak Reference 25920ST

• 36mm steel case

• Annual Calendar “Quantième Annuel' functions

• Serial E-205xx/22x Dating to ca .2000

• Blue grande tapisserie dial with date and months , French language

• Integrated bracelet to fit a wrist up to 18cm

• Calibre 2224/2814 automatic movement

• Audemars Piguet Swiss service invoice

• Fully serviced by Audemars Piguet , warranty till march 2027

• Free worldwide Fedex Priority shipping