The Patek Philippe Nautilus 7118/1A is a 35.2 mm stainless steel ladies Nautilus with an integrated bracelet, a date at 3 o'clock, no center seconds hand, and the automatic Caliber 324 S C. A fake Patek Philippe Nautilus 7118/1A almost never matches that 8.62 mm case thickness or the movement visible through the sapphire back. Spotting one comes down to measurements, dial texture, bracelet finishing, and what the case back actually shows.
What is the Patek Philippe Nautilus 7118/1A?
The 7118/1A is the smaller steel Nautilus, introduced in 2018 as the mechanical successor to the quartz 7018. It combines the rounded octagonal bezel with a tapered integrated bracelet and runs on an automatic movement. Reference 7118/1A-001 has a blue sunburst dial, while -010 uses a silvery opaline dial.
- Case: 35.2 mm diameter, 8.62 mm thick, stainless steel, sapphire front and back
- Movement: Caliber 324 S C, automatic, 45-hour power reserve, Patek Philippe Seal
- Dial: hours, minutes, date at 3 o'clock, no sweeping seconds hand
- Water resistance: 60 m
How can you tell a fake Patek Philippe Nautilus 7118/1A from a real one?
Case size and thickness
Counterfeit 7118/1A watches usually measure 36 to 38 mm across and 9 to 11 mm thick, because a thin 8.62 mm case is costly to machine. A genuine watch sits flat on the wrist and slides under a cuff, while most replicas sit noticeably taller. Calipers on the case middle, not the bezel, give the clearest reading.
Dial, printing, and date window
Genuine blue dials shift from deep navy to bright blue as light moves across the horizontal grooves. Fake dials often look flat, purple, or uniformly metallic. The date window should be sharply cut with crisp numerals, while replica fonts look bolder or sit too deep behind the glass.
Bracelet and clasp
The real integrated bracelet tapers evenly and alternates polished center links with brushed outer links, with no sharp edges underneath. Replica bracelets feel lighter, rattle at the links, and show shallow or doubled logo stamps on the folding clasp. Inspect the clasp engraving with a loupe for uneven depth.
Case back and movement
Through the sapphire case back, a genuine 324 S C shows Geneva stripes, circular graining, a gold rotor, and a Gyromax balance with a Spiromax spring. Fake movements reveal rough finishing, a plated rotor, or a solid case back on cheaper versions. The Patek Philippe Seal engraving around the glass is fine and even on the original and often blurry on copies.
What movement is inside a fake 7118/1A?
Most counterfeit 7118/1A watches use third-party automatic movements such as the Miyota 9015, the Seiko NH35, or a Chinese ST2130, sometimes with an engraved rotor added to look convincing. None of these share the 324 S C architecture, jewel count, or finishing. That is why a so-called 1:1 replica still shows the wrong balance cock, wrong rotor engraving, and wrong beat rate to anyone who knows the movement.
What do counterfeit 7118/1A watches cost?
- Low tier, roughly $50 to $120: quartz or basic automatic, wrong thickness, printed dial, solid case back
- Mid tier, roughly $150 to $400: automatic movement, sapphire crystal, closer dial color, still thick and heavy
- High tier, roughly $500 to $900: decorated clone movement, tighter dimensions, better bracelet, still not dimensionally identical
Price alone does not prove quality, and a high price does not make a counterfeit genuine. The 7118/1A gets far fewer copies than the men's 5711, so the replica market for this reference is smaller and the quality spread is wider.
Is buying or selling a fake Patek Philippe Nautilus 7118/1A illegal in the US?
Yes. Trafficking in counterfeit goods is a federal crime under 18 U.S.C. § 2320, and a first offense carries up to 10 years in prison, rising to 20 years for repeat offenses. U.S. Customs and Border Protection seizes counterfeit watches at the border, and even personal-use orders can be confiscated.
What should you check first?
Start with measurements, then the movement through the case back, then the bracelet finishing. Case thickness and the 324 S C architecture are the two hardest things for a counterfeit to match. If a seller refuses clear photos of the movement, that answer is already visible.