Quick answer

The Patek Philippe Nautilus 5711/1A is a 40 mm stainless steel watch with an integrated bracelet, made from 2006 to 2021. Replicas sell from about $50 to $700. None uses Patek Philippe's caliber 26-330 S C. In the United States, importing, selling, or trafficking a counterfeit watch is a federal crime under 18 U.S.C. section 2320, and U.S. Customs and Border Protection can seize the shipment.

The genuine reference

Patek Philippe launched the 5711/1A in 2006 for the 30th anniversary of the Nautilus. The case is steel, 40 mm wide and 8.3 mm thick. Water resistance is 120 m. The dial has a horizontal embossed pattern, a date window at 3 o'clock, and applied hour markers. The bracelet integrates with the case and tapers toward the clasp.

  • Case: 40 mm steel, 8.3 mm thick, sapphire front and back
  • Movement: caliber 324 S C from 2006 to 2019, then caliber 26-330 S C
  • Caliber 26-330 S C: automatic, 30 jewels, 45-hour power reserve, 28,800 vph
  • Dial variants: blue (5711/1A-010), white (5711/1A-011), and a green run in 2021

Patek Philippe discontinued the 5711/1A in 2021. The replacement is the 5811/1G-001, a 41 mm white gold model introduced in 2022. List price on the last 5711/1A sat in the mid-$30,000 range. Resale prices climbed above $200,000 for the blue dial in early 2022, then fell through 2023 and 2024. A 5711/1A-018 with a Tiffany blue dial sold at auction in December 2021 for $6.5 million.

Replica tiers

Replica supply splits into three price bands. The band determines the steel, the movement, and the case thickness.

  1. Under $60. Quartz or low-grade automatic movement. Plated brass or a low-grade steel alloy. Printed dial. Case thickness of 10 mm or more, against 8.3 mm on the original.
  2. $120 to $250. 316L steel case, Miyota 9015 or Seiko NH35 movement. Case shape closer to the reference. Dial texture and date font stay wrong.
  3. $350 to $700. Builds sold under factory codes such as 3K, PPF, and ZF. 904L steel option. Movement plates decorated to copy the 26-330 layout. Case thickness within 0.2 to 0.4 mm of 8.3 mm.

Details that differ at every tier

  • Movement: no replica carries a Patek Philippe movement. Miyota 9015 runs at 28,800 vph, so the seconds hand sweep looks correct, but the date change and winding feel differ.
  • Dial: the genuine horizontal pattern is embossed. Replicas stamp or print it, and the surface flattens under side light.
  • Date wheel: font weight and numeral shape are the most cited differences.
  • Bracelet and clasp: link taper, end-link fit, and the depth of the clasp engraving.
  • Case back: sapphire with a movement that does not match the bridges or jewel count of the original.

Legal status in the US

18 U.S.C. section 2320 covers trafficking in counterfeit goods and services. A first offense carries up to 10 years in prison and a $2 million fine for an individual. A second offense carries up to 20 years. The statute applies to goods bearing a counterfeit mark, which includes a copied brand name or logo.

U.S. Customs and Border Protection treats counterfeit watches as prohibited merchandise. Officers can seize and forfeit shipments. There is no personal-use exemption for trademark-infringing goods, so an order shipped from abroad can be held or destroyed even when the buyer intends to keep one watch. Patek Philippe does not sell parts to the public and does not service watches it did not make.

Buying signals that do not hold up

Seller language such as "1:1," "mirror quality," or "same factory" carries no standard and no verification. Photographs from a factory catalog are reused across sellers. A serial number and reference number stamped on a case back prove nothing on their own, since both are copied from genuine listings.

The only reliable check on any 5711/1A is physical inspection by a watchmaker with access to Patek Philippe service records. Movement finish, case dimension, and dial embossing are the three points that separate the reference from a copy.