Quick answer

The 26470 is the 42 mm Royal Oak Offshore chronograph, and a replica of it lives or dies on three things: case profile, dial texture, and movement. If the case is too thick, the Tapisserie squares are flat, or the chronograph runs on a stock movement with a printed rotor, you are looking at a low grade build no matter how polished the photos are. Settle those three points first, then worry about the strap, the clasp, and the packaging.

What the 26470 actually is

The reference belongs to the Royal Oak Offshore line that Audemars Piguet launched in 1993 as a larger, sportier take on the Royal Oak. The 26470 generation uses a 42 mm case in steel or precious metal, a chronograph layout with subdials at 12, 6, and 9 o'clock, a date window at 3, and the Mega Tapisserie dial with its raised grid of squares. Case thickness on the genuine piece is roughly 14.6 mm and water resistance is rated to 100 m. Those numbers matter because a replica that misses the thickness by 1.5 mm wears very differently on the wrist and is easy to pick out next to the real thing.

What to check before you commit

Case and bezel

Look at the bezel screws. On a good build the screws sit in a slot cut into the bezel rather than resting on top of the surface, and the slots line up at a consistent angle. Compare brushing on the top surfaces against polishing on the chamfers. Many replicas either polish the whole case or brush the whole case, which flattens the contrast the original is known for. Thickness is the fastest tell. Target a caliper reading of 14.5 to 15.2 mm, and treat anything near 16 mm as a lower tier case.

Dial and hands

The Mega Tapisserie grid should have raised squares with sharp edges and even spacing, not printed lines. Subdial rings should be recessed, and the hands should carry the correct width and lume fill. Cyclops magnification over the date is another check. The genuine magnification is modest, while many replicas over magnify and distort the date font.

Movement

Most replicas in this reference use an Asia 7750 chronograph base, sometimes with a decorative plate and rotor meant to suggest the calibre 3126 / 3840 layout. A decorated 7750 can look convincing through a display back, but the giveaway is subdial spacing and running seconds behavior. Ask the seller for a short video of the chronograph starting, stopping, and resetting. A chronograph that stutters, or a reset that fails to snap back to zero, points to a poorly finished movement.

Bracelet and strap

Check that the bracelet tapers, that the links flex without rattle, and that the clasp closes with a firm click. Rubber straps should have clean, straight edges and a buckle finish that matches the case.

Parameter bands that separate the tiers

• Case diameter: 42 mm is correct. 44 mm or larger is a different reference and a different watch on the wrist.
• Case thickness: 14.5 to 15.2 mm reads close to the original. Past 15.5 mm the case starts to look slab sided.
• Movement: a decorated automatic chronograph with subdials at 12, 6, and 9 beats a quartz build or a plain three hand automatic.
• Crystal: sapphire with a light anti reflective coat. Mineral glass shows up on entry builds and scratches fast.
• Water resistance: treat any replica as splash resistant at best unless the case back gasket and crown seals have been pressure tested.
• Weight: a steel 42 mm Offshore on a bracelet should feel substantial in hand, in line with any other steel chronograph of the same size.

Pitfalls to avoid

• Buying from the first listing you find. Compare several sellers on the same reference and ask for dated photos of the actual watch.
• Trusting studio photos. Daylight photos show dial texture and case finishing honestly.
• Believing 1:1 claims. No replica is identical, and a seller who promises perfection is describing marketing, not product.
• Ignoring local law. Importing counterfeit goods is illegal in the United States and many other countries, and shipments can be seized.
• Skipping service. A clone chronograph movement benefits from a service, so line up a watchmaker who works on replicas before you buy.

FAQ

Is a replica 26470 worth buying?

Only if you accept that it is a cosmetic tribute. Treat it as a fashion watch with a chronograph movement, expect to service it, and do not expect genuine performance or resale value.

How do I spot a low grade 26470 replica?

Measure the thickness, look at the dial texture under a light, and study the bezel screw slots. Any one of those three failing tells you the rest of the build is likely rushed as well.

Do the chronograph pushers work on replicas?

On automatic chronograph builds, yes. The pushers start, stop, and reset. On quartz builds the subdials are often decorative and the pushers do nothing.

Can I swim with one?

Do not. Even when a seller rates the watch for swimming, the seals on a replica are not verified. Keep it away from pools and rinse it dry after contact with water.

Legal and practical note

Counterfeit watches infringe trademarks, and trafficking in them is a criminal offense in many jurisdictions. Personal import is restricted in the US, and customs can hold or destroy a shipment. Buy with that in mind. If you own the genuine article, keep the papers and service records so its provenance stays clear.