Short answer
A "16402" listing almost always points to a fake Audemars Piguet Royal Oak in the 41mm neighbourhood: octagonal bezel, eight hexagonal screws, tapisserie dial, integrated bracelet. The number itself is seller shorthand. It does not line up cleanly with AP's own catalogue, so treat it as a shape and a mood rather than a specification. Two sellers using the same number can ship you two completely different watches.
What lands on your doorstep depends on the factory that built it and the movement inside. That is the whole story.
Replica AP Royal Oak 16402 Replica Watch: A Buyer's Guide to Case, Dial, and Movement
What the reference number tells you (and what it doesn't)
Genuine Royal Oak references are tied to documented dimensions, movement calibres, and production years. Replica reference numbers are marketing. Sellers recycle them the way clothing brands recycle size labels. So the useful questions are never "is 16402 accurate?" but "which case diameter, which thickness, which movement, and which dial colour?"
Fake AP Royal Oak 16402 Copy: Reference Check and Buyer Guide
Ask for those four things in writing. If a seller can't answer, that is your answer.
audemars piguet royal oak 16402 replica
Case size and thickness
Genuine Royal Oaks wear thin because the movement is thin. Replicas almost never are. A 41mm fake usually measures 10mm to 12mm thick against roughly 9mm to 10mm real. On the wrist, that extra millimetre or two changes how the watch sits under a cuff and how the bezel catches light.
- Steel grade: 316L is common, 904L gets advertised a lot and delivered less often.
- Bezel screws: should be flush, evenly spaced, with clean slots. Slotted cheese-head look means cheap.
- Case back: engraved, not laser-printed. Engraving has depth you can feel with a fingernail.
The movement is where the money goes
Three tiers show up repeatedly. Entry level runs a Seiko NH35 or a basic Miyota. Mid tier uses a Miyota 9015 or an ETA 2824 clone, both of which are serviceable and keep decent time. Top tier uses a decorated automatic with a rotor engraved to mimic an in-house calibre. It is still an import movement under the decoration, but the finishing looks convincing through a display back.
If you care about timekeeping rather than looks, the 9015 and the 2824 clone are the sensible picks. Ask for timegrapher numbers: rate in seconds per day, amplitude, and beat error. Anything past plus or minus 15 seconds a day needs regulating.
Bracelet and finishing
This is where cheap replicas expose themselves fastest. Feel the link edges. Genuine bracelet edges are broken and smooth. Bad ones are sharp enough to catch a shirt sleeve. Check the taper from case to clasp, the play between links, and whether the screws are real or decorative caps.
The clasp engraving matters less than the clasp action. A stiff, gritty clasp on a watch that otherwise looks fine is a tell you'll notice every single day.
Dial, hands, and crystal
Tapisserie texture should be stamped into the dial, not printed flat. Tilt it toward light and look for raised squares with real depth. Cheap versions look like a photo of a dial. Date wheel font and alignment at the window is another giveaway, along with hand finishing, where cheap lume plots look like paint drops.
Anti-reflective coating on the crystal separates the better builds from the rest. Without it, the dial washes out outdoors.
Water resistance: assume nothing
Replicas are rarely pressure tested and often ship with dry or missing gaskets. Do not swim in one, do not shower in one, and do not assume a screw-down crown means anything. If moisture gets in, the movement rusts and the watch is finished.
The part sellers skip
Selling counterfeit watches is illegal in the United States, and importing them can get the parcel seized and destroyed. Beyond the legal side, there is no warranty, no manufacturer service, and effectively no resale value. A replica is a costume, not an asset. It also can't be passed off as genuine without deceiving someone, which is the real line most buyers eventually have to think about.
Buy it because you like how it looks on your wrist. Don't buy it expecting anything else.