Quick answer
A counterfeit Patek Philippe Nautilus 7118 gives itself away at five points: the bezel bevel, the embossed dial, the date font, the bracelet screws, and the movement finish. The 7118 is a 35.2 mm automatic Nautilus built in steel and rose gold. No replica has matched the case chamfer, the depth of the dial embossing, or the finish on caliber 324 S C. When a seller offers a 7118 far below market, treat the watch as fake until an independent watchmaker opens the case back.
Reference facts to confirm
- Case width: 35.2 mm, from the ladies' Nautilus line
- Materials: stainless steel (7118/1A) and rose gold (7118/1R); diamond-set bezel on 7118/1200A
- Dial: horizontal embossed wave pattern, date window at 3 o'clock
- Movement: caliber 324 S C automatic, Patek Philippe Seal, 45 hours of power reserve
- Water resistance: 60 m
- Bracelet: integrated, polished center links with brushed outer links
Numbers get swapped in counterfeit listings. Confirm the reference against the case serial, the certificate, and the movement number before you judge anything else.
Authentication steps
- Measure the case with calipers. A genuine 7118 reads 35.2 mm across the bezel. Fakes land at 34 mm or 36 mm, and the bezel looks out of proportion against the case band.
- Run a finger along the bezel edge. Genuine bezels have a flat top, a crisp chamfer, and a hard line where the top meets the side. Counterfeit bezels show a soft, rolled edge because the case is cast and then polished instead of milled.
- Tilt the dial under a lamp. The wave embossing on a real 7118 catches light in continuous, even bands from the 12 o'clock marker to the date window. Fakes show shallow stamping, uneven spacing, or a printed pattern with no relief.
- Study the date at 3 o'clock. Genuine date discs use a thin, high-contrast font with open counters, and the numeral sits centered in the aperture. Fakes use heavy typefaces and leave the date drifting to one side.
- Inspect the bracelet screws and links. Genuine links align flush at the sides, and each screw head sits in a shallow counterbore with no burrs. On fakes, screw slots chew the metal, links rattle when you twist the bracelet, and the clasp stamping looks faint.
- Open the case back. Caliber 324 S C shows Geneva stripes, chamfered bridges, polished screw heads, and a gold rotor with the Calatrava cross. Replicas hide a generic movement behind printed or engraved plates.
- Read the case back engraving. Reference and serial numbers on a genuine watch are cut deep and aligned with the case axis. Laser etching looks pale and shallow.
- Verify the numbers. Ask Patek Philippe or an authorized service center to confirm that the case and movement numbers match the archive. This step settles the question.
Paperwork red flags
A certificate with a mismatched serial, a missing movement number, or a service record that cannot be traced back to a Patek Philippe service center points to a counterfeit. Genuine 7118 watches come with a certificate of origin, a matching serial, and an archive extract on request.
Before you buy or sell
Photograph the case back, the dial, the bracelet clasp, and the movement through the display back. Send those images to a watchmaker who handles Nautilus service work. Budget for a full inspection, since a counterfeit passes a hand check but fails under a loupe. If you already own a suspect 7118, stop wearing it, keep the paperwork, and report the sale to the platform or dealer that handled it.