Short answer

A replica De Ville Trésor copies the case, dial, and strap of the Omega original. It does not copy the movement. The genuine watch runs Omega Calibre 8910, a Co-Axial Master Chronometer movement certified by METAS. Replicas use Miyota, Seagull, or unbranded Chinese automatic movements. Replica listings run about $200 to $800. Steel genuine references retailed near $6,000 in the US.

What the genuine De Ville Trésor is

Omega places the Trésor inside the De Ville line. The 40 mm steel reference uses Calibre 8910, an automatic movement with a co-axial escapement, a silicon balance spring, and a 72 hour power reserve. Omega rates the movement to 15,000 gauss. METAS certifies each movement after eight tests, including exposure to a 15,000 gauss magnetic field and an average daily rate of 0 to +5 seconds.

The case measures 40 mm across and about 10.7 mm thick. Water resistance is 30 m. The crystal is domed sapphire with anti-reflective treatment on both faces. The dial carries applied indexes, polished hands, and printed text. Case options include stainless steel and Sedna gold. Specifications differ by reference, and Omega lists the exact movement and case numbers for each one.

What replica versions copy

  • Case diameter close to 40 mm, with 36 mm copies also sold.
  • Domed sapphire or mineral crystal.
  • Domed dial with applied indexes and printed Omega text.
  • Leather strap with a pin buckle or a deployant clasp.

What replica versions do not copy

  • The movement. Genuine Calibre 8910 has a free-sprung balance and a silicon hairspring. Replica movements use metal hairsprings and a regulating lever.
  • METAS certification. Replicas ship without a Master Chronometer card, or with a card that has no matching test data.
  • Case finishing. Genuine polished surfaces sit flat. Replica polishing shows waves under a loupe.
  • Parts support. Omega does not sell parts for counterfeits and does not service them.

Tells to check on a replica

Dial print is the first check. Genuine text stays sharp at 10x magnification. Replica text shows filled counters and uneven stroke weight. Crown engraving is the second check. The Omega symbol on a genuine crown has crisp edges and a clean cut. Third, check the anti-reflective tint. Replica sapphire often flashes purple or blue under a lamp, while the genuine coating reads neutral. Fourth, weigh the watch. Replica cases use lower grade steel and often run 10 to 20 grams light against the same reference.

Movement decoration and rate

Genuine Calibre 8910 has arabesque Geneva waves on the rotor and bridges. The pattern is cut into the metal, not printed. Many replicas use laser etching that shows a flat gray surface with no depth. A copy built on a Miyota 9015 has no co-axial escapement, and its balance beats at 28,800 vibrations per hour instead of the 25,200 of the Omega.

Prices and paperwork

Sellers list Trésor copies between $200 and $800. Higher prices go to versions with a decorated Asian clone movement. Genuine steel Trésor references retailed near $6,000 to $6,600, and gold references cost more. A genuine watch arrives with a Master Chronometer certification card that lists the movement number and the test results for that watch.

Legal and service facts

Counterfeit watches are illegal to import and sell in the US under 18 U.S.C. 2320. Customs and Border Protection can seize shipments at the border. Omega does not authenticate or repair counterfeits, so a stopped replica stays stopped unless an independent watchmaker takes the job. Resale value on a replica is near zero.