The Omega Seamaster Planet Ocean Ultra Deep is the watch that followed the dive to the bottom of the Mariana Trench, and VS Factory (VSF) builds the 45.5mm blue gradient version here. It's the biggest and most extreme of the Planet Ocean line, a tool watch first and a luxury piece second. The gradient dial is the signature, going from ocean blue at the top to black at the bottom, and the no-date layout keeps it clean.
| Spec | Detail |
|---|---|
| Factory | VS Factory (VSF) |
| Reference | 215.30.46.21.03.001 (Ultra Deep, gradient blue) |
| Movement | Dandong 8912 (DD8912) co-axial automatic, no-date |
| Case | 45.5mm, 316L steel |
| Bezel | Unidirectional black ceramic, Liquidmetal diving scale |
| Dial | Blue-to-black gradient, white gold-tone appliques, no-date |
| Bracelet | 316L 3-link, diver extension clasp |
The dial. A gradient that shifts from a sunlit blue at the top to black at the bottom, meant to read as a descent into the trench. The broad-arrow hands and applied markers are white gold tone with Super-LumiNova, and the light blue "ULTRA DEEP" text sits below the center. No date window, so the layout is symmetrical. That's the whole point of the no-date Ultra Deep.
The movement. The Dandong 8912, a true clone of the Omega co-axial caliber. Because it's a no-date movement there's no phantom date position when you pull the crown. It also has the independent jumping hour hand, so you can move the hour forward or back in one-hour steps without stopping the minute and seconds hands. The decoration is behind a titanium caseback medallion, blackened screws and Geneva waves in arabesque.
The case. 45.5mm, and thick. The source notes it's 316L steel rather than Omega's O-MEGASTEEL, which is a different alloy. That's a real material difference worth knowing about, even if the finish looks the part. The crown guards are asymmetrical, and the Ultra Deep has no helium escape valve at all, so the ten o'clock side of the case is uninterrupted.
The bezel. Black ceramic, unidirectional, with a Liquidmetal diving scale. Liquidmetal means the numerals are fused into the ceramic rather than painted on top, so they stay flush and don't fade.
The bracelet. A heavy 3-link steel bracelet to balance the 45.5mm case, brushed outer links with polished sides, and a deployant clasp with a rack-and-pusher micro-adjustment so it fits over a wetsuit.
The takeaway. This is the Omega Planet Ocean Ultra Deep in the blue gradient, and VS Factory (VSF) got the two things that define it right: the DD8912 no-date movement with the jumping hour hand, and that blue-to-black gradient dial. One caveat to keep in mind: it's 316L steel standing in for Omega's O-MEGASTEEL, which is a different material. If that doesn't bother you, this is the deepest-diving Omega you can get as a clone.