Pre-owned Audemars Piguet Royal Oak ref. 25594SA.O.0789SA.01 is one of the most enduring references in Royal Oak history. Introduced in the mid-1980s as the successor to the earlier Royal Oak Day-Date 5572, it added a moon phase display to the collection, creating a beautifully balanced dial while still keeping that famous Gérald Genta-designed case and integrated bracelet. Remarkably, the ref. 25594 stayed in the Royal Oak catalog for more than two decades, making it one of the longest-running references Audemars Piguet has ever produced. This particular example is the desirable two-tone version, pairing stainless steel with yellow gold, although the model was also offered in all-steel and full-gold configurations. The versatile 36mm case wears beautifully today, while the signature tapisserie dial displays the day, date, and moon phase in a layout that is both highly functional and visually harmonious. Shop Audemars Piguet Royal Oak Collection