Quick answer

A replica Omega Planet Ocean Ultra Deep 6000m copies the case shape, dial, bezel, and bracelet of the 2022 Omega Seamaster Planet Ocean Ultra Deep. It does not copy the 6000 m depth rating. The real watch measures 45.5 mm across and about 15 mm thick. Most replicas match the outside dimensions within 0.5 mm. They use a 316L steel case and a decorated automatic movement. Depth rating on a replica is unknown until a pressure test.

The real watch in numbers

  • Omega put the production Ultra Deep on sale in 2022.
  • Water resistance: 6000 m (20,000 ft).
  • Case: 45.5 mm wide, about 15 mm thick. Grade 5 titanium on some references, O-MEGASTEEL on others.
  • Movement: Co-Axial Master Chronometer Calibre 8912. No date. 60 hours of power reserve. Magnetic resistance to 15,000 gauss. Beat rate 25,200 vph.
  • Crystal: domed sapphire with anti-reflective coating on both faces.
  • Origin: the 2019 prototype rode Victor Vescovo's DSV Limiting Factor to 10,928 m in Challenger Deep.

What replicas get right

Case diameter, lug profile, and the crown at 3 o'clock. The bezel insert carries a dive scale. The broad arrow hands sit over a gradient dial. Bracelet end links and the folding clasp are close in shape. High-tier dials use applied markers and printed text that holds up under a loupe.

Where replicas fall short

  • Weight. 316L steel is denser than grade 5 titanium. A steel replica of a titanium reference feels 30 g to 50 g heavier.
  • Depth. No replica carries a 6000 m rating. Gaskets, case back threads, and crystal thickness differ from the original.
  • Lume. Super-LumiNova on a replica glows dimmer and fades in 2 to 4 hours. The real watch runs past 8 hours.
  • Movement. Replicas use a Miyota 8215, a Seiko NH35, or a decorated Asian automatic at 21,600 vph to 28,800 vph. The 8912 runs at 25,200 vph.
  • Bezel action. Replicas show 60 clicks with more backplay and a weaker spring.

Price tiers

Low tier: $80 to $150. Mineral crystal, stamped clasp, 21,600 vph movement, weak lume. Mid tier: $180 to $350. Sapphire crystal, better case finishing, AR coating. High tier: $400 to $650. Decorated clone movement, ceramic bezel insert, closer dial printing. Prices track supply and model year.

Before you buy

  1. Ask for the case width in millimeters and a photo next to a ruler.
  2. Ask which movement is inside. Get the caliber name.
  3. Ask for a pressure test result if you plan to swim. Most sellers do not test.
  4. Check the bezel insert material. Ceramic sounds dull when tapped. Aluminum sounds hollow.
  5. Check the crystal. Sapphire resists a steel key. Mineral does not.

Water resistance

Treat any replica as splash resistant at best. Gaskets on replica cases are dry from the factory. A watchmaker can test and grease the seals. Even then, the case does not carry the 6000 m rating of the Omega. Do not dive with it.