How to spot a fake
Royal Oak

Look at the tapisserie dial under angled light and, if the reference has a sapphire caseback, the movement behind it. Genuine tapisserie is a deep, perfectly regular grid of tiny pyramids with razor-sharp ridges that flash uniformly as you tilt the watch. Fakes render it too shallow, with rounded or uneven ridges and pyramids that vary in size across the dial. Through the caseback, a genuine self-winding caliber shows hand-bevelled bridges, Cotes de Geneve, and a solid 22k gold rotor; a fake uses a decorated clone movement with flat, machine-stamped edges and a plated rotor.

The octagonal bezel is held by eight hexagonal screws that are hand-polished and precisely aligned. On genuine watches the screws are secured from behind with white-gold fixings so they sit at a consistent orientation and do not spin freely, and the hexagonal heads have crisp, sharp corners. Counterfeits often show randomly rotated screws, rounded or mushy hexagonal corners, and dull rather than mirror-polished heads.

It depends on the reference. The ultra-thin 39mm Jumbo used the self-winding caliber 2121 for decades (5402, 15202) before the 16202 switched to the newer caliber 7121 in 2022. The 41mm Royal Oak Selfwinding (15500/15510) uses the caliber 4302 with a 70-hour power reserve and central seconds. The Royal Oak Selfwinding Chronograph (26240) uses the in-house flyback caliber 4401. All are visible through a sapphire caseback on current references and show AP's hand-finishing and a gold rotor.

The 15202ST was the direct descendant of the original 1972 Jumbo (ref. 5402ST): an ultra-thin 39mm case, 8.1mm thick, with the caliber 2121 and no central seconds. It was replaced by the 16202 in 2022. The 15500ST is a 41mm model, roughly 10.4mm thick, with a date and central-seconds caliber 4302 - larger, thicker and more modern. "Jumbo" specifically means the ultra-thin 39mm line (5402, 15202, 16202) that stays closest to Genta's original.

The Royal Oak was designed by Gerald Genta and launched in 1972 as reference 5402ST. Genta drew inspiration from a traditional diver's helmet with its octagonal shape and exposed screws. It was the first luxury stainless-steel sports watch, priced above many gold watches of the era, and it established the integrated-bracelet sports-watch category that the Patek Philippe Nautilus later joined.

A serial number alone cannot prove authenticity - fakes copy real serials. The reference and serial are engraved between the lugs or on the caseback, and genuine engraving is deep, crisp and evenly spaced. The most reliable path is the AP Extract from the Archives or authentication through an AP boutique, backed by the original certificate and box. Treat serial checks as one signal among many, alongside the dial, movement and finishing. See our AP serial number lookup guide for details.

A price far below market is the biggest single red flag. Genuine steel Royal Oaks trade well above retail, so a "deal" from an unverified seller almost always signals a replica or a franken-watch built from mixed parts. Combine the price check with the tapisserie test, the caseback movement inspection, the bezel screws and the bracelet finishing before you commit.

Yes. Upload clear photos of the dial, the case profile, the bezel screws, the bracelet and clasp, and the caseback. Our AI checks the tapisserie depth and regularity, screw alignment, finishing transitions, engraving fonts and movement details against genuine references and returns an authenticity verdict with a full breakdown in about 30 seconds. For a watch of this value, pair the scan with an in-person inspection by a certified watchmaker.