Quick answer
A fake Audemars Piguet reference 16402 is a counterfeit of an older Royal Oak reference, and it fails or passes on exact details, not on brand logos. Judge it with a documented comparison of case geometry, dial printing, bracelet construction, movement, and serials. If any check cannot be completed, treat the watch as unverified and do not pay.
Prerequisites
- A 10x loupe and a caliper.
- Access to known 16402 reference photos or an authorized AP service center.
- A qualified watchmaker who can open the caseback.
Step-by-step check
- Confirm the exact 16402 configuration with Audemars Piguet or an authorized service center. Record the case metal, dial color, bracelet code, and movement calibre for that reference.
- Measure the case width, thickness, and lug profile with a caliper. Compare the numbers with the confirmed 16402 specification; a generic Royal Oak case often has the wrong thickness or lug curve.
- Inspect the dial under a loupe. Check the tapisserie grid alignment, the Audemars Piguet printing, the date font, the date window edges, and the hand finish.
- Examine the bracelet and clasp. Check the link taper, screw heads, end-link fit, clasp stamping, and edge finishing against known 16402 examples.
- Open the caseback with a watchmaker. Verify the movement calibre, rotor engraving, bridges, jewel count, and caseback interior stamping.
- Match the caseback number, movement number, and paperwork. Ask for service records and compare the serial format with AP records.
- Get an independent authentication in writing before payment. Use an AP service center or a watchmaker with documented AP experience.
Red flags
- Seller refuses movement photos or an in-person inspection.
- Price is far below the range for a genuine 16402 in that condition.
- Caseback engraving is shallow, uneven, or mismatched to the paperwork.
- Bracelet screws are oversized, sharp, or do not sit flush.
- Dial printing is thick, uneven, or misaligned with the tapisserie.
- Watch is offered as new old stock with no service history and no serial check.
Legal and ownership risks
Counterfeit watches are illegal to import and sell in the United States, and customs officers may seize them. A fake 16402 has no manufacturer warranty, no service support from Audemars Piguet, and no lawful resale path. Treat any offer that avoids serial checks or written authentication as a loss risk, not a bargain.