The replica Omega Planet Ocean Ultra Deep 6000m is a 45.5mm dive watch build that copies the look of Omega's record-setting Seamaster without copying its 6,000-meter depth rating. Replicas get the case proportions, the dial layout, and the ceramic bezel close enough for everyday wear, but none of them survive a real saturation dive. Buy one as a visual homage to a famous tool watch, not as a piece of diving equipment.
What the Genuine Ultra Deep Is
Omega built the Planet Ocean Ultra Deep around a Grade 5 titanium case rated to 6,000 m, or 20,000 ft. The watch carries a Co-Axial Master Chronometer movement with a 60-hour power reserve, a sapphire crystal with anti-reflective treatment on both sides, and a ceramic bezel with a dive scale. It is a large, heavy-looking watch on paper, and its size is the first thing anyone notices on the wrist.
That combination of size and depth rating is why the model became a collector talking point. It also explains why so many buyers look for a replica version: the real thing sits at a price level most people will never touch.
What Replica Builds Actually Deliver
- Case: Most replicas use 316L or 904L stainless steel rather than titanium, often with a titanium-style matte finish. Diameter usually lands at or near 45.5mm.
- Crystal: Sapphire is common at the mid and upper tiers. Cheaper examples use mineral glass with a domed profile.
- Bezel: Ceramic inserts with printed or filled dive scales. Alignment varies a lot between factories.
- Dial: Applied markers, printed text, and lume that ranges from weak to genuinely usable.
- Caseback: Usually a solid or display back with an engraved diving-bell motif.
Case Size and Wearability
A 45.5mm case with a thick profile wears large. On a 7-inch wrist it covers most of the flat surface, and the lugs sit close to the edges. If you normally wear 40mm or 42mm watches, this is a step up in presence rather than a subtle change.
Weight matters too. A stainless steel replica of a titanium original will feel noticeably heavier. That is not a defect, it is just physics, and it is worth knowing before you commit.
Movement Options
Replica Ultra Deep builds usually ship with one of three movement families:
- Japanese automatic (Seiko NH35 or similar). Reliable, easy to service, hacking and hand-winding in most versions. The safest long-term choice.
- Chinese automatic (clone-style movements). Often decorated to resemble the Omega caliber. Performance is fine when the movement is a proven design, less predictable on unknown units.
- Quartz. Rare in this model, but it exists in budget tiers. No sweeping seconds hand.
Ask which movement is inside before buying. A replica Omega Planet Ocean Ultra Deep 6000m with a known Japanese automatic will outlast a cheaper build with an unproven caliber.
Water Resistance: Read This Carefully
No replica of this watch is tested to 6,000 m. Gaskets, caseback seals, crown threads, and crystal seating are the parts that fail, and replica assembly lines do not pressure-test to that standard. A realistic expectation is splash resistance and maybe light swimming on a well-sealed example.
If you plan to swim, have a watchmaker pressure-test the case first. If you plan to dive, wear a purpose-built ISO 6425 dive watch instead.
Quality Checks Before You Pay
- Bezel alignment at 12 o'clock and smooth rotation with no back-play
- Dial printing that is sharp under a loupe, with no bleeding at the edges
- Marker alignment and lume that charges evenly
- Crown that threads smoothly and sits flush when closed
- Date window centering if the model has one
- Bracelet end-link fit with no visible gaps at the lugs
Practical and Legal Notes
A replica is a copy, not the original, and it carries no manufacturer warranty or service support. Resale value is close to zero. Customs rules on counterfeit goods differ by country, so check your local import rules before ordering from overseas.
For buyers who want the Ultra Deep look on a normal budget and understand those limits, the replica Omega Planet Ocean Ultra Deep 6000m is a wearable, recognizable piece. For buyers who want the depth rating printed on the dial, only the genuine article delivers it.