Short answer
A replica Omega Seamaster Aqua Terra Worldtimer copies a 43 mm stainless steel watch that Omega released in 2017. The genuine version runs Master Chronometer Calibre 8938 and carries a titanium world-map dial with 24 city names. Replica versions sell for about $250 to $600. They match the case size and the dial layout. They do not match the movement, the map finish, or the city ring alignment.
The genuine reference
Reference 220.10.43.22.03.001 uses a stainless steel case at 43 mm across and about 14.1 mm thick. Lug width is 21 mm. Water resistance is 150 m. Sapphire covers the dial and the caseback.
Calibre 8938 is a twin-barrel automatic. It runs at 25,200 vibrations per hour and holds 60 hours of power reserve. METAS tests each example under an eight-part protocol and certifies it as a Master Chronometer.
Omega cuts the world map disc from grade 5 titanium. A laser removes material so the continents sit matte against a polished dial. The outer ring lists 24 cities, one for each time zone. A day and night indicator sits inside that ring. The date sits at 6 o'clock. Later editions add a titanium case and other dial colors.
What replica versions copy
Most replicas reproduce the 43 mm case, the world map, the 24-city ring, and the sapphire caseback. Blue and green dial options exist. The bracelet copies the five-link Aqua Terra design. Sellers name factories with short letter codes; the same code does not guarantee the same product from a different seller.
Where copies differ:
- Movement. Replicas use a Chinese automatic. Some add a decorated rotor plate that imitates the 8938 finish. Beat rate is often 28,800 vph, not 25,200.
- Power reserve. Measured reserve on replica movements falls between 36 and 44 hours.
- Map disc. The genuine disc is titanium and matte. Copies print the continents on a lacquered plate, so the map reflects light.
- City ring. Print quality varies. City names can sit off-center from their time zone marks.
- Date wheel. Font weight and window bevel differ from the genuine parts.
Inspection points
- Check that each of the 24 city names centers on its marker. Misalignment is the most common fault.
- Turn the crown through each setting position and watch the 24-hour ring. Confirm the ring and the city ring stay in register. On many replicas they drift after setting.
- Look at the map under a lamp. A flat printed surface with visible halftone dots is a print, not titanium.
- Read the caseback engraving. Check the serial format and the Master Chronometer wording against the genuine text.
- Time the watch over 24 hours. A rate drift past 10 seconds per day points to an unregulated movement.
Legal and practical notes
Counterfeit watches are illegal to import into the United States. US Customs and Border Protection seizes shipments that infringe trademarks. Selling a counterfeit as genuine is a federal crime under 18 U.S.C. Section 2320.
Omega will not service a replica, and the genuine warranty does not apply. An independent watchmaker may service a Chinese automatic for $80 to $200. Parts availability varies by movement.
Price comparison
Genuine steel Worldtimer retail sits near $9,000 to $10,500 in the US. Prices change with each Omega update. The genuine titanium version costs more than the steel version. Replica listings run from about $250 to $600, with titanium-finish copies at the top of that range.
Specifications for replica internals come from seller listings, not from published factory data. Treat any movement claim as unverified.