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If you want a replica of the Omega Seamaster Planet Ocean Ultra Deep 6000M, judge it by four things before anything else: case profile and thickness, dial gradient and print, bezel insert and lume, and how honestly the seller describes the movement. The genuine watch is a 45.5 mm grade 5 titanium diver rated to 6,000 m (20,000 ft), and most replicas get the silhouette right while missing the small geometry that makes the original recognizable on the wrist. Buy the version that is closest in size and finish, not the one with the longest feature list. No replica matches the original pressure rating, so treat water resistance claims as marketing, not spec.

What to look for

  • Case metal and weight. The genuine piece is titanium; most replicas are stainless steel, so they feel heavier and look brighter. Ask the seller what the case is made of and expect steel at most price points.
  • Case size. About 45.5 mm across and roughly 18 mm thick, with a wide, slab-sided profile. Replicas that come in at 42 mm or 13 mm are a different watch wearing a similar name.
  • Lugs and strap. The Ultra Deep uses manta-style lugs with a bar the strap threads through, not standard spring bars. Check that the strap and hardware match.
  • Bezel. Ceramic insert, clean minute track, aligned triangle and lume pip at 12. Turn it and listen. Gritty or loose action points to a cheap build.
  • Dial. Gradient finish, applied markers, and depth rating print. Look for crisp text and a date window that lines up with the rehaut.
  • Valve and crown. The helium escape valve sits on the left side of the case, the crown on the right with guards. Both should sit flush and thread tightly.
  • Movement. The real watch runs the Co-Axial Master Chronometer 8912 with a 60-hour reserve behind a sapphire display back. Replicas usually carry a decorated automatic. Ask for the base caliber, the beat rate, and the power reserve.

Parameter bands

Use these as a sanity check when a listing looks too good:

  • Case diameter: 45 to 46 mm. Anything under 44 mm is a different model.
  • Thickness: 17 to 19 mm. A slim replica is a red flag on this reference.
  • Weight: titanium versions sit closer to the 120 g mark on a rubber strap, steel replicas run heavier.
  • Power reserve: 40 to 60 hours for a decent automatic. Anything claimed above 70 is either wrong or a different movement.
  • Water resistance: sellers print 6,000 m. Assume splash resistance only unless you have had the seals tested yourself.
  • Lume: should glow evenly and fade slowly. Patchy or green-tinted lume in daylight is a common flaw.

Pitfalls to avoid

  • Depth rating claims. A replica has not been pressure tested at 6,000 m or anywhere close. Do not dive or swim with it.
  • Claimed grade 5 titanium at a low price. Titanium costs more to machine, so cheap listings that promise it seldom deliver.
  • Stock photos and stolen QC images. Ask for dated, angled shots of the exact unit, including the caseback and clasp.
  • Movement bait and switch. Confirm the base caliber in writing before payment.
  • Customs and legal risk. Importing counterfeit goods is illegal in the United States and shipments can be seized, so know the rules where you live.
  • No return policy. If a seller will not accept a return on a defective unit, walk away.

FAQ

Is a fake Ultra Deep 6000M worth buying?

Only if you accept it as a lookalike. You get the silhouette and the wrist presence, not the titanium case, the Master Chronometer movement, or the depth rating.

Can I take it in the water?

Treat it as splash resistant. Gaskets on replicas are seldom tested, and a failed seal ruins the movement.

How can I tell titanium from steel?

Titanium looks grayer, feels warmer, and weighs less. Steel is brighter, colder, and takes scratches differently. A magnet test settles nothing on either metal.

What should I check first when it arrives?

Bezel alignment, crown and valve threads, the date change, lume, and timekeeping over 24 hours. Report any fault to the seller in writing right away.