The Short Answer
A real Patek Philippe Nautilus 7118 is a 35.2 mm steel automatic with an embossed wave dial and caliber 324 S C inside. Every 7118 offered online for a few hundred or a few thousand dollars is a counterfeit. The replica trade has copied this reference since 2016, and the better fakes survive a casual look. Telling them apart means checking measurements, finishing, printing, and paperwork in person.
What the Genuine 7118 Looks Like
Patek Philippe launched the 7118/1A in 2016 as the replacement for the 7018. The case is stainless steel, 35.2 mm across and roughly 8.6 mm thick, with the rounded octagonal bezel that defines the Nautilus line. The bracelet is integrated and tapers toward a fold-over clasp. Dials come in silvery opaline, blue, and black variants, all with horizontal embossed grooves. Rose gold applied numerals and hands carry luminescent coating. The movement is automatic with about 45 hours of power reserve, and it is visible through a sapphire caseback.
Where Fakes Come From
Most counterfeit 7118s originate in the same workshops that produce fake Rolex and Audemars Piguet models. Sellers market them with factory nicknames and tier labels such as 1:1, super clone, or Swiss movement. Those labels describe the seller margin, not the watch. Some listings pair a real-looking photo with a different watch, and some use stolen images of a genuine 7118.
How to Check a 7118 in Hand
- Measure the case across the bezel from 10 o'clock to 4 o'clock. A genuine 7118/1A measures 35.2 mm. Fakes often run 35.5 mm to 37 mm because the maker reuses a larger case shell.
- Weigh the watch on a jewelry scale. Counterfeit bracelets use different link thickness and hollow pins, so the total weight rarely lands inside the genuine range.
- Inspect the date window under a loupe. The genuine aperture has crisp beveled edges and a fine-printed date wheel. Fakes show a thick rim and distorted numerals.
- Run a fingernail along the bezel edge. Genuine satin brushing is even and the polished chamfer is sharp. Copies feel rounded or uneven.
- Study the dial grooves at an angle. The genuine embossing is deep and consistent across the whole dial. Copies look shallow and washed out near the center.
- Check the brand name and the Swiss made line at 6 o'clock. On fakes the letters crowd together and the line sits too close to the minute track.
- Examine the clasp stamping with a loupe. On the genuine item the Patek Philippe cross and the reference number are stamped into the metal.
- Read the caseback engraving around the sapphire. Genuine engraving is deep, centered, and fills the space. Fakes show shallow laser marks with uneven spacing.
- Compare the serial number on the caseback with the movement number. Both should appear in Patek Philippe records for that reference.
- Request an Extract from the Archives from Patek Philippe before you buy. The document confirms the reference, movement number, and dial type as built.
Movement Tells
Genuine caliber 324 S C shows Geneva stripes, anglage on the bridges, and a gold rotor with the Patek Philippe seal. Replicas use decorated clones of a Miyota or Seiko base, or a Chinese copy of the 324. Look at the rotor weight and the engraving depth. A stamped rotor with flat, painted lettering is not genuine finishing.
Price and Legal Reality
A pre-owned 7118/1A trades well above 25,000 US dollars on the secondary market, and gem-set 7118/1200A versions run higher. No legitimate seller offers a new one for 500 dollars. A counterfeit costs more than the purchase price. U.S. Customs and Border Protection can seize counterfeit watches at import, and trafficking in counterfeit goods is illegal under trademark law. Resale is nearly impossible because auction houses and dealers refuse them.
Bottom Line
If the price is low, the seller is anonymous, and the photos come from a stock set, the watch is fake. Authentication on a 7118 comes down to measured dimensions, finishing under magnification, and paperwork from Patek Philippe. Nothing else settles it.