Launched in 1996 and in production until 2013, reference 25820 was made in a total of 1235 pieces including 378 pieces in stainless steel and platinum like the present example. It marked the introduction of the leap year indication on Royal Oak perpetual calendar models.

The aesthetic impact of this breathtaking perpetual calendar Royal Oak is entrusted to the combination of its black dial and mirror-polished platinum bezel and platinum bracelet links. While normally the Royal Oak bezel is satin-finished like most of the rest of the case, some rare examples - usually, but not exclusively, featuring platinum bezels such as in this instance - present this unusual mirror polishing. While it might sound as a simple detail, in fact this tweak changes dramatically the look of the piece. In this instance, the glimmer of the polished bezel is mirrored by the silvered chapter rings of the subsidiary counters. The final result is an ode to sporty elegance.

Offered in excellent condition and complete of its original Guarantee booklet and box, this timepiece is as easily wearable as it is enormously charming. A true classic destined to be as appealing and relevant in 50 years as it is today.