For the first three decades following the launch of the Audemars Piguet Royal Oak, the watches were housed in outsourced movements from other manufacturers. However, this changed with the introduction of the present reference 15300 in the early 2000s. For the first time, a Royal Oak featured a movement created in-house by Audemars Piguet: the self-winding caliber 3120. This meticulously finished movement marked Audemars Piguet's emergence as a true manufacture, capable of developing movements tailored to its most important timepieces.

Featuring a 60-hour power reserve, a bridge-suspended Gyromax balance, and a date mechanism with a safety clutch system, the caliber 3120 was engineered to perfection. Its iconic 39mm size is not found in the current catalog, aside from the exclusive “Jumbo” and RD#3 models. The clean "Grande Tapisserie" white waffle dial and integrated bracelet have solidified the Royal Oak's status as one of the most instantly recognizable watches of the modern era.

Now discontinued, the reference 15300 has quickly attained collectible status. Rarely appearing in today’s market, especially in exceptional condition like this example, it epitomizes a pivotal era for the Royal Oak and its illustrious manufacture.