A fake Audemars Piguet Royal Oak Perpetual Calendar is a replica of AP's ref. 26574, built to copy the octagonal bezel, the Grande Tapisserie dial, and the four calendar displays across the front. Quality splits into clear tiers, and the gap between a $90 quartz copy and a $700 automatic copy shows in the dial print, the subdial spacing, the bracelet finish, and whether the calendar hands track the date on their own.
The real 26574 trades for tens of thousands of dollars on the secondary market, so buyers who want the look turn to replicas. What separates a good copy from a bad one comes down to dial geometry, case thickness, and the movement that drives the calendar module.
What the genuine Royal Oak Perpetual Calendar looks like
Audemars Piguet builds the 26574 in a 41 mm case that measures about 9.5 mm thick. The eight-sided bezel is held by eight hexagonal screws, and the watch runs on the in-house calibre 5134, an automatic movement with a perpetual calendar module.
Dial layout
Count the subdials and the outer ring. The month and leap-year display sits at 3 o'clock, the date at 9, and the moon phase at 6. A week hand sweeps a ring of numbers around the dial edge, which is the feature most replicas get wrong.
Case and bracelet specs
The bracelet tapers from about 26 mm at the lugs to 18 mm at the clasp. Links alternate brushed and polished surfaces, and the clasp carries an engraved AP logo plus a reference number.
Movement options in replica AP perpetual calendars
Three movement families cover the replica market. Each one changes what the watch can do and what it costs to fix.
- Quartz: thin, light, and set with pushers or a recessed corrector. The subdials often work, but the moon phase is a printed disc.
- Japanese automatic with a calendar module: a Miyota 9015 or a similar base with a bolt-on module. The date and month advance on their own, and the rotor gives the watch some heft.
- Decorated Asian automatic: bridges and a rotor engraved to mirror the 5134. The view through the caseback looks close to the real thing, and service options stay narrow.
Price tiers and what they buy
Asking prices move with the seller, the region, and the exchange rate. The tiers below describe what you get at each level.
- Under $150: quartz copies with a steel or plated case, mineral glass, and a dial that reads well from a distance. Screw slots on the bezel do not line up.
- $200 to $400: entry automatics, sapphire glass on the better examples, and a bracelet with solid links. Subdials land close but the font runs thick.
- $450 to $900: the top tier, with a case profile close to 1:1, tighter dial print, a decorated movement, and a bracelet that matches the real taper and finish.
Flaws to check before you buy
Dial faults
Look at the subdial rings first. On budget copies the rings sit at the wrong radius, the moon phase shows a flat print instead of a recessed disc, and the word Automatic is placed off center.
Case and bracelet faults
Screw heads should sit in a straight line around the bezel. If they rest at random angles, the case came from a budget line. On the bracelet, check the gap between the first link and the case, and press the clasp to hear for a solid click instead of a rattle.
Movement faults
Ask for a photo of the caseback. A real 5134 shows a skeletonized rotor with a gold segment and Cotes de Geneve stripes. A quartz copy hides behind a flat cover with a sticker.
FAQ
Do the calendar functions work on a fake AP Royal Oak Perpetual Calendar?
On the better automatics, yes. The date, month, and leap year advance on their own, and you set the moon phase with a corrector. On quartz copies the moon phase is cosmetic, and the leap year may not track.
Does the replica show the correct week number?
Most do not. The week ring is printed on the dial in many copies, so the hand points at a fixed number that never moves. A working week indicator needs the module from the higher tiers.
Is the case solid gold?
No. Replicas use steel with gold plating or a steel case with a gold-tone finish. Plating wears through at the lugs and the clasp, and the color drifts toward yellow or rose over a year of regular wear.
Can you swim with one?
Treat water resistance as unknown unless the seller tests it and shares the result. Gaskets on replica cases are often dry from the factory, so keep the watch away from pools and showers.
What to ask the seller before paying
- Which movement sits inside, and can you send a photo of the caseback?
- Does the week hand move with the date, or is the ring printed?
- What is the case thickness in millimeters?
- Are the bezel screws aligned, and can you send a straight-on photo?
- What is the return policy if the calendar does not advance?
A dress watch that stays under a cuff hides small dial faults. A watch you plan to hand around at a table does not. Put your money into the dial print, the case profile, and the movement, and treat the rest as details.