Replica Omega Seamaster Aqua Terra Worldtimer: Short Answer

The replica Omega Seamaster Aqua Terra Worldtimer copies Omega reference 220.10.43.22.03.001. That reference is the 43 mm steel model with a blue dial. Copy prices run $150 to $600. Most copies run a Seiko NH34 GMT movement. On the genuine watch the 24-city ring turns and lines up cities against a 24-hour scale. On most copies that ring is fixed, or it moves with the crown in a crude way. No copy carries METAS certification.

Genuine Specs to Compare

Use these numbers when you read a listing.

  • Case: 43 mm, 14.1 mm thick, steel or Grade 5 titanium
  • Lug width: 21 mm
  • Water resistance: 150 m
  • Movement: Omega calibre 8938, automatic, 60-hour power reserve
  • Certification: METAS Master Chronometer, 8 test protocols
  • Magnetic resistance: 15,000 gauss
  • Dial: Earth from the North Pole, laser-ablated on a titanium plate
  • Caseback: sapphire, laser-engraved globe
  • Strap: steel bracelet with butterfly clasp, or rubber

What Copies Get Right

Case diameter on most copies is 43 mm, so the watch sits like the real one on a 17 cm to 19 cm wrist. Lugs measure 21 mm, and straps cut for the genuine watch fit. The dial layout matches: date at 6 o'clock, city ring outside, 24-hour ring inside the chapter ring. Sapphire crystals with inner anti-reflective coating show up at the $250 tier and above. The bracelet uses solid links and a push-button clasp on the top tier.

What Copies Get Wrong

The dial map is the largest gap. Omega laser-ablates the continents onto a titanium plate, so the landmasses sit above the ocean surface. Copies print the map in one flat layer. Under a loupe the copy map looks like a sticker. Case thickness on copies lands at 14.5 mm to 15.2 mm. The genuine case is 14.1 mm. Caseback engraving is shallow, and the globe lines are coarse. Crown action is rough on the $150 tier. Lume is weak and often green in place of the genuine blue-green mix. No copy maker publishes accuracy data, so timekeeping claims stay unverified.

Movement Tiers

  1. $120 to $200: 2813 or DG2813. No GMT function. The GMT hand is glued and points to nothing.
  2. $200 to $350: Seiko NH34 (4R34). True GMT with an independent 24-hour hand. 41-hour power reserve. The rotor spins loud.
  3. $350 to $600: decorated NH34 or a Chinese GMT clone with engraving on the rotor and bridges. Some sellers print "Co-Axial Master Chronometer" on the rotor.

Ask the seller for a movement photo before you pay. A rotor photo tells you which tier you get.

Checks Before You Buy

  • Turn the city ring. It should move in both directions with the crown.
  • Pull the crown to position 2. The GMT hand should jump in one-hour steps.
  • Measure the case. Ask for a caliper photo.
  • Check the date window. It should sit at 6 o'clock and stay centered.
  • Ask for a lume photo in the dark with a fixed exposure.

Water and Service

Replica gaskets are not tested. Keep the watch out of showers, pools, and salt water. Wipe the case with a dry cloth after contact with sweat. The NH34 has a 41-hour reserve and runs about 10 to 20 seconds per day in most copies. A watchmaker can regulate it for $30 to $60. Service the movement every 3 to 5 years, or when the amplitude drops. Parts for the NH34 are common and low cost.