Short answer
A "fake Patek Philippe Aquanaut 5168G" is a counterfeit copy of a watch Patek Philippe introduced in 2017, the Aquanaut line's 20th year. The genuine reference 5168G has a 42.2 mm case in 18k white gold, calibre 324 S C inside, and a water resistance rating of 120 m. Copies sold online as "first copy" or "1:1" watches use steel cases, third-party movements, and molded dials. They do not use 18k gold. Patek Philippe does not service them, and US law bars their import.
What the real 5168G is
- Case: 18k white gold, 42.2 mm across, about 8.9 mm thick.
- Movement: calibre 324 S C, self-winding, 21k gold rotor, 45-hour power reserve, 28,800 vibrations per hour (4 Hz).
- Dial: embossed Aquanaut grid. Reference 5168G-001 has a blue dial. Reference 5168G-010, added in 2021, has a khaki green dial.
- Strap: composite material with a fold-over clasp.
- Crystal: sapphire front and back. No cyclops over the date.
- Crown: screw-down. Water resistance 120 m.
- Markings: the Patek Philippe Seal. The case carries an Au750 gold hallmark.
What "first copy" sellers ship
Listings for a 5168G copy name the same reference number and the same 42.2 mm figure. The parts differ.
- Case metal: 316L or 904L steel, not 18k white gold. Some cases hold a tungsten slug to add heft.
- Movement: a Miyota 9015, a Seiko NH35, or a Chinese copy of an ETA 2824, with a plated rotor and engraved bridges.
- Dial: molded plastic or stamped metal with a shallow grid and soft corners. Date font and window bevel differ from the original.
- Strap: silicone or TPU with molded texture.
- Water resistance: untested in most cases. Pressure tests on copies often fail at 50 m.
Prices for these watches run from about $80 to about $1,200. A higher price buys better finishing on the same steel case.
Checks that separate a 5168G from a copy
- Weigh the head. Gold is dense. A steel copy weighs close to half.
- Look for the Au750 hallmark and the Patek Philippe Seal on the case back. Copies laser-etch marks that sit flat and thin.
- Read the date. Numbers on a copy sit off-center in the window, and the window edge has no bevel.
- Check the grid on the dial. The original has raised squares with sharp corners and a matte finish between them.
- Turn the crown. The 324 S C winds with a light, even feel. A Miyota or ETA copy feels different in the hand.
- Measure the case. The original is about 8.9 mm thick. Many copies sit at 10 mm or above.
- Ask for an Extract from the Archives. Patek Philippe issues this record from the serial number and case number.
The gold math
At a gold price of $2,700 per troy ounce, one gram of 18k white gold costs about $65. A 42 mm gold case holds tens of grams of metal. Raw gold in the case alone runs into the thousands of dollars. A watch that sells for $400 cannot contain that gold.
US law on counterfeits
18 U.S.C. § 2320 makes trafficking in counterfeit goods a federal crime, with higher penalties for repeat offenses and for goods that carry a counterfeit mark on the product itself. 19 U.S.C. § 1526 bars import of merchandise with a counterfeit mark. The Trade Facilitation and Trade Enforcement Act of 2015 removed the personal-use exemption, so a single counterfeit watch shipped from abroad can be seized. Customs and Border Protection destroys seized watches. Civil claims fall under the Lanham Act, with statutory damages up to $200,000 per counterfeit mark, or $2,000,000 if the use is willful.
Service, resale, and records
Patek Philippe services its own watches and will not repair a counterfeit. Independent watchmakers often refuse as well, because parts do not fit and the maker cannot supply them. Resale value on a copy is close to zero, and listing one for sale carries the same legal exposure as importing it.
Prices for the genuine reference change by market and by year. Patek Philippe does not publish a current price sheet for every reference, so confirm the figure with an authorized dealer or a recent auction result.