A replica Audemars Piguet Royal Oak Extra Thin is a counterfeit copy of the 39 mm "Jumbo" Royal Oak, sold in reference 15202 or 16202 styling. The hardest detail to reproduce is thickness. The genuine watch measures 8.1 mm front to back, while most replicas land between 8.5 mm and 10 mm, so a caliper check is the fastest way to tell a careful copy from a crude one.
What Defines the Genuine Royal Oak Extra Thin?
The original Extra-Thin launched in 1972 as the Royal Oak Jumbo, designed by Gérald Genta with an octagonal bezel, eight visible screws and an integrated bracelet. The modern version keeps the 39 mm case and runs the in-house caliber 7121, which is only 3.2 mm thick. That movement is why the genuine watch stays so slim, and it is also why no replica matches the genuine profile exactly.
How Do Replica Movements Compare?
Replica makers cannot copy the thin architecture of a 2121 or 7121 at scale, so they build around slim automatic movements such as the Miyota 9015 or a decorated Chinese equivalent. These run at a different beat rate, usually 28,800 vibrations per hour, and they add roughly half a millimeter to a millimeter and a half of case height. You get a sweeping seconds hand, but a different power reserve and a shorter service life.
What Should You Check on a Replica Royal Oak Extra Thin?
- Case thickness: measure with calipers. Anything above 9.5 mm sits visibly high on the wrist.
- Tapisserie dial: the grid pattern should be raised and crisp, not printed flat or blurry under a loupe.
- Date window: aligned with the 3 o'clock marker, with a font weight that matches the rest of the dial.
- Bracelet taper: links should narrow steadily toward the clasp and flex without rattling.
- Bezel screws: exactly eight, evenly spaced, and set flush with the octagonal surface.
- Caseback engraving: clean text, correct reference numbers, and no doubled or smudged lettering.
Are Replica Watches Legal to Buy in the United States?
No. A replica is an unauthorized copy that infringes a live trademark, and U.S. Customs and Border Protection can seize and destroy counterfeit watches at the border. Sellers also rarely disclose the actual movement grade, the case material or the real water resistance. Treat any listing as unverified until you inspect the watch yourself.
What Do You Give Up With a Replica?
You give up manufacturer service, a warranty, guaranteed water resistance and any meaningful resale value. Independent watchmakers can usually regulate or replace a Miyota-based movement, but parts for a decorated clone movement are hard to source. Resale is limited to the secondhand replica market, where prices fall fast.
How Should You Compare Two Replicas Side by Side?
Put both on a flat surface, measure case height at the center of the caseback, then compare dial texture under the same light. Check how the bracelet drapes and whether the clasp closes with a firm, single click. A replica that wins on thickness and dial texture usually wins everywhere else too.