Quick answer

A fake Omega Seamaster Aqua Terra 150M copies the case, dial, and Omega markings. It does not use an Omega movement. Genuine models run caliber 8900 or 8800, carry METAS Master Chronometer certification, and cost about $5,700 to $7,000 in steel on a bracelet at US retail. Fakes sell for $80 to $400. High-end copies reach $600 to $1,000. No copy holds a valid METAS certificate or an Omega service record.

Genuine specs to compare against

  • Case sizes: 34 mm, 38 mm, 41 mm.
  • Water resistance: 150 m, stated as 500 ft on the caseback.
  • Movement: caliber 8900 in the 41 mm, caliber 8800 in the 38 mm.
  • Power reserve: 60 hours.
  • Magnetic resistance: 15,000 gauss.
  • Accuracy standard: 0 to +5 seconds per day under the METAS test.
  • Crystal: sapphire front, sapphire caseback.
  • Weight: about 160 g for a 41 mm steel model on a full bracelet.

Dial and case tells

  • The Omega symbol at 12 is applied metal. Copies print it or use a thick stamped piece with soft edges.
  • Teak pattern grooves are cut into the dial surface. Copies show shallow lines with uneven spacing.
  • The date sits at 6 o'clock on current 38 mm and 41 mm models. Copies show thick date numerals or a disc that sits off center.
  • Genuine sapphire has anti-reflective coating on both faces. Copies use mineral glass with a blue or green tint.
  • Caseback engraving is sharp and filled. Copies show shallow laser text and rough letter edges.

Movement tells

Open the display back. The genuine 8900 shows a co-axial escapement, a silicon balance spring, and arabesque Cotes de Geneve stripes on the bridges. The rotor carries the Omega name and a gold balance bridge. Copies use a Seiko NH35, a Miyota 9015, or a Chinese clone with decorative plates. A Miyota 9015 has 24 jewels and a winding weight shape that does not match the Omega rotor. Decoration on top of a third-party movement is the most common fake tell.

Price tiers

The $80 to $400 group uses mineral glass, a stamped dial, and a basic automatic movement. The $400 to $1,000 group adds sapphire, a steel bracelet with solid links, and a decorated movement. Both groups fail the METAS test. Omega cannot service either one.

How to verify a watch

  1. Read the movement number on the rotor or caseback.
  2. Enter that number in the Omega Master Chronometer certificate lookup.
  3. Weigh the watch. A 41 mm steel Aqua Terra sits near 160 g.
  4. Sight the balance and the escapement through the caseback.
  5. Ask for the box, the pictogram card, and the sales receipt.

US law and customs

18 U.S.C. 2320 makes trafficking in counterfeit goods a federal crime. A first offense carries up to 10 years in prison and a $2,000,000 fine for an individual. US Customs and Border Protection can seize and destroy counterfeit shipments. Counterfeit goods do not qualify for the $800 de minimis exemption. Omega can also file a civil suit under the Lanham Act. Buyers who import a single fake watch face seizure of the item and a possible penalty claim.

Service and resale

Omega service centers decline watches that hold a non-Omega movement. A fake has no factory warranty and no parts supply. Resale value sits near zero. A genuine steel Aqua Terra returns about 60 to 75 percent of retail on the used market.