Introduced in 1996 and produced until 2013, the Audemars Piguet Royal Oak Perpetual Calendar reference 25820 represents a pivotal advancement in the history of the Royal Oak collection. As the first perpetual calendar within the Royal Oak line to feature a leap year indicator, this reference seamlessly combined technical innovation with the bold design language for which the model is celebrated. Over its 17-year production run, only 1,235 examples were created, with just 15 pieces executed in the extraordinary combination of yellow gold and tantalum, making the present example an exceptionally rare and highly sought-after collector’s timepiece.

Crafted in 1997, the present Royal Oak reference 25820TA exemplifies the brand’s ability to push the boundaries of both creativity and technical expertise. The case, constructed from tantalum, a rare and highly corrosion-resistant metal, is distinguished by its unique grey-blue hue, which contrasts strikingly with the warm, lustrous tones of yellow gold. This interplay of materials is further elevated by the champagne-colored dial and subsidiary dials, accented with navy blue font, creating a harmonious and visually captivating composition. The technical sophistication of the reference is matched by its aesthetic refinement. The perpetual calendar movement, a hallmark of Audemars Piguet’s horological artistry, is displayed in all its intricate glory through its caseback, offering a peak of the perpetual calendar module’s architecture.

The present example, numbered “008” of this ultra-exclusive limited edition of 15 pieces, is offered in honest condition and is accompanied by its full set of accessories. Research with the manufacture confirms that the watch was sold in 1997 and produced in 15 examples.