Short answer

A fake Ultra Deep 6000m is a replica of the Omega Seamaster Planet Ocean Ultra Deep. The genuine watch carries a 6,000 m (20,000 ft) depth rating. No replica sold at normal replica prices holds that rating. Most copies survive hand washing and rain. Some leak in a sink. Buy the replica for the shape and the dial. Do not dive with it.

What 6,000 m means on the real watch

Omega rates the Planet Ocean Ultra Deep at 6,000 m. The case is Grade 5 titanium, 45.5 mm wide, listed at 18.1 mm thick. The sapphire crystal is domed with a conical inner face. Omega built the model from the 2019 Ultra Deep Professional prototype that Victor Vescovo took to 10,928 m in the Mariana Trench. ISO 6425, the diver watch standard, calls for a pressure test at 125 percent of the rated depth on every watch. That is 7,500 m equivalent, or about 750 bar.

What replicas ship with

Case size and thickness

Genuine: 45.5 mm wide, 18.1 mm thick. Most replicas measure 44 mm to 45 mm wide and 15 mm to 16.5 mm thick. The gap comes from a flat caseback and a standard crystal. On the wrist the replica sits lower and the case profile looks flatter from the side.

Weight and material

Titanium is about 45 percent lighter than steel by volume. The genuine case is Grade 5 titanium. Many replicas use 316L stainless steel and call it titanium in the listing. A steel case of the same size carries more mass. Ask the seller for a scale photo in grams before you pay. If the number matches a steel watch, the case is steel.

Water resistance

Replica factories do not pressure test finished watches. Gaskets are generic. Crown threads are cut to looser tolerance than the original. Depth text on the caseback is decorative. Treat the watch as splash resistant at best. Pool water at 3 m puts about 0.3 bar on the case, and some replicas hold that, while others fog the crystal. For real swimming, buy a Seiko or a Citizen with a factory rating.

Movement

The genuine uses the Co-Axial Master Chronometer Calibre 8912. It is METAS certified, runs at 25,200 vph (3.5 Hz), holds a 60 hour power reserve, and resists magnetic fields to 15,000 gauss. Replicas use Asian automatics: a decorated clone, a Miyota 8215 copy, or a DG2813. Rotor text copies the Omega engraving. Many replica movements run at 21,600 vph (3 Hz). A timegrapher photo shows the beat rate, the rate in seconds per day, and the amplitude. Ask for one.

Dial and caseback

Genuine engraving is laser cut with sharp edges. Replica engraving is often stamped, with burred letters and shallow depth. Printed dial text on a replica can sit off center or use the wrong font weight. The Ultra Deep uses a fixed strap system with lugs Omega calls Manta. Replicas copy the lug shape but take standard spring bars, so aftermarket straps fit the copy and not the genuine.

Checks before you buy

  • Ask for caliper photos of case width and thickness.
  • Ask for a scale photo in grams.
  • Ask for a timegrapher photo with rate and amplitude.
  • Compare caseback text against official Omega photos.
  • Assume zero dive rating until someone pressures tests the watch.

What is not known

Replica batches change. Factories publish no specs, and sellers reuse photos from earlier runs. The numbers above describe common patterns, not every unit. No third party publishes pressure test results for replica Ultra Deep watches.