Quick answer
A fake Patek Philippe Aquanaut 5168G is a counterfeit copy of a 42.2 mm 18k white gold sports watch that Patek Philippe ships with a blue or khaki green embossed dial. The counterfeit market covers everything from a plated steel watch under USD 100 to a decorated clone at a few hundred dollars. None of them use a gold case, none contain a Patek Philippe caliber 324 S C, and none will pass inspection at a Patek Philippe service center. Genuine examples trade in the tens of thousands, so price alone settles most cases.
What the real 5168G is
- Reference 5168G from the Aquanaut collection, launched in 2017 for the line's 20th anniversary.
- 42.2 mm case in 18k white gold with 120 m water resistance.
- Embossed grid dial, applied gold numerals with luminous coating, date at 3 o'clock.
- Caliber 324 S C automatic, 45 hour power reserve, shown through a sapphire caseback.
- Composite Tropical strap on a white gold deployant clasp.
- Two dial versions: 5168G-001 blue, 5168G-010 khaki green.
Why this reference is a common counterfeit target
The 5168G is a simple three hand watch with no chronograph or calendar module, so a copy only has to look right from arm's length. Rubber strap, steel case, printed dial: the parts are cheap to source. The reference also sells far above its counterfeit price, which gives sellers room to promise "same factory, same materials" and still undercut the real thing by 99 percent.
How to check a 5168G
- Weigh the watch in your hand. 18k gold is close to twice the density of steel, so a genuine head feels heavy for a 42 mm watch on a rubber strap. Plated steel and titanium copies feel light and hollow.
- Read the caseback stampings with a loupe. Genuine cases carry Swiss precious metal hallmarks for 18k gold, a 750 fineness mark, the reference number, the case serial, and clean Patek Philippe engraving. Fakes show shallow laser etching, missing hallmarks, or a 750 stamp on metal that is not gold.
- Study the dial under magnification. The grid should be crisp and even, the printing sharp at the edges, and the date window centered with no white gap. Copies show soft grid lines, thick fonts, and a date wheel that sits off center.
- Check the hands and markers. Genuine hands are faceted and polished with flat lume fill. Copies show rounded edges, unpolished bevels, and lume that spills over the frame.
- Look through the caseback. A genuine 324 S C shows Geneva stripes on the bridges, circular graining on the base plate, polished screws, and a signed gold rotor. Copies use a Miyota or Chinese automatic under a glued decorative plate, with mismatched screw heads and rotor engraving in the wrong font.
- Feel the strap and clasp. The Tropical strap has a defined embossed pattern and the white gold clasp snaps with a heavy, tight action. Copies use soft rubber with a faint pattern and a steel clasp with rough edges.
- Verify the paperwork and serials. Ask for the Certificate of Origin, the travel pouch, and any service records. Submit the case and movement serials to a Patek Philippe Salon or an authorized service center before money changes hands.
- Compare the asking price to the market. A genuine 5168G runs into five figures and higher on the secondary market. Anything offered at four figures or less is not white gold and not real.
What you take on when you buy one
In the United States, trafficking in counterfeit goods is a federal offense under 18 U.S.C. § 2320, with penalties that reach 10 years in prison and a $2,000,000 fine for an individual on a first offense. U.S. Customs and Border Protection can seize and destroy counterfeit watches at import under 19 U.S.C. § 1526, and trademark owners can sue for statutory damages of up to $2,000,000 per counterfeit mark per type of goods under the Lanham Act. Beyond the legal exposure, no Patek Philippe service center will repair a counterfeit, no insurer will cover it at real value, and resale of a counterfeit is itself illegal.