OMEGA · Seamaster Planet Ocean 6000M and Seamaster Planet Ocean 600M
OMEGA 215.30.46.21.03.002 vs OMEGA 217.30.42.21.01.001
10 published specifications differ between these two, and 4 are identical. Every figure below is what the manufacturer states for that reference; nothing is inferred from the other watch.
What differs
| Specification | OMEGA Ultra Deep 6000M, O-MEGASTEEL, 45.5mm, blue dial215.30.46.21.03.002 | OMEGA Planet Ocean 600M Co-Axial Master Chronometer 42mm, black dial217.30.42.21.01.001 |
|---|---|---|
| Case | O-MEGASTEEL, 45.5 mm | Steel, 42 mm |
| Diameter | 45.5 mm | 42 mm |
| Thickness | 18.12 mm | 13.79 mm |
| Lug to lug | 51.9 mm | 47.5 mm |
| Lug width | 22 mm | 21 mm |
| Water resistance | 600 bar (6000 metres / 20000 feet) | 60 bar (600 metres / 2000 feet) |
| Crystal | Domed, protuberant and scratch-resistant sapphire crystal with anti-reflective treatment on both sides | Flat scratch-resistant sapphire crystal with anti-reflective treatment on both sides |
| Dial | Blue | Black |
| Bracelet | O-MEGASTEEL | Steel |
| Movement notes | Listed by OMEGA as a Master Chronometer certified watch. Total product weight approximately 254 g. | Listed by OMEGA as a Master Chronometer certified watch. Total product weight approximately 177 g. |
What is identical
Worth knowing as much as the differences: these are the specifications you cannot use to tell the two apart.
- Clasp
- Foldover clasp with comfort setting and diver extension
- Calibre
- Omega 8912
- Movement
- Self winding
- Power reserve
- 60 hours
What the differences cost you
Each note below follows from the published figures in the tables above — what they mean for intake, for a listing, and for the handover. Nothing here estimates a price or a margin.
One of these is the harder fit
Lug to lug is 51.9 mm on the 215.30.46.21.03.002 against 47.5 mm on the 217.30.42.21.01.001 — a 4.4 mm difference across the wrist. Diameter is what buyers ask about; lug to lug is what decides whether a case sits flat or overhangs. Ask for a wrist measurement before shipping the 215.30.46.21.03.002, and put the figure in the listing rather than the diameter alone.
These reach different buyers
45.5 mm on the 215.30.46.21.03.002 against 42 mm on the 217.30.42.21.01.001. Diameter is a poor predictor of how a watch actually sits, but it is the field buyers filter on, so the two land in front of different people. Do not let one listing's photographs or copy stand in for the other.
A visible difference in how they wear
4.3 mm of thickness separates these, with the 215.30.46.21.03.002 the taller at 18.1 mm. That is the difference between a watch that goes under a cuff and one that catches on it — worth a photograph from the side rather than a number in a table.
Do not describe these the same way
6,000 metres on the 215.30.46.21.03.002 against 600 on the 217.30.42.21.01.001 — not a variation on the same watch but a different class of one, built around a case and crystal designed for depth. Expect different buyers, different questions, and a different service conversation. Never carry the 215.30.46.21.03.002's rating into the 217.30.42.21.01.001's listing.
What to check on each
215.30.46.21.03.002
- Give the buyer all four case figures in writing before shipping: 45.5 mm across, 18.12 mm tall, 51.9 mm between lug tips and 254 grams. Any one of them alone understates what arrives in the box.
- Describe the case material as O-MEGASTEEL, which is what OMEGA calls it, rather than as stainless steel. It is a named proprietary alloy and the bracelet is specified in it too.
- Inspect the protuberant crystal along its raised edge under raking light. It stands well proud of the case by design, it is coated on both faces, and it meets obstacles before the bezel does.
217.30.42.21.01.001
- Unfold the diver extension completely and check the hinge is not sprung and that it lies flat again when closed. On a watch that has never been dived it has been shut since new.
- Examine the flat crystal's outer anti-reflective coating for wear. OMEGA treats both faces on this reference, so unlike the inside-only crystals elsewhere in the range there is a coating here you can actually scratch.
- Do not quote the 600-metre rating as a present-day measurement on a used example. It describes the case as built, and nothing about an unserviced watch confirms it.
Sources
- OMEGA official product page for reference 215.30.46.21.03.002 (Seamaster Planet Ocean 6000M Ultra Deep Co-Axial Master Chronometer 45.5 mm) - Between lugs: 22 mm; Lug-to-lug: 51.90 mm; Thickness: 18.12 mm; Case diameter: 45.5 mm; Case: O-MEGASTEEL; Dial color: Blue; Crystal: Domed, protuberant and scratch-resistant sapphire crystal with anti-reflective treatment on both sides; Water resistance: 600 bar (6000 metres / 20000 feet); Total product weight (approx.): 254 g; Caliber: Omega 8912; Movement type: Self winding; Power reserve: 60 hours; Bracelet material: O-MEGASTEEL; Type of Clasp: Foldover clasp with comfort setting and diver extension — retrieved 2026-09-23
- OMEGA official product page for reference 217.30.42.21.01.001 (Seamaster Planet Ocean 600M Co-Axial Master Chronometer 42 mm, steel) - Between lugs: 21 mm; Lug-to-lug: 47.50 mm; Thickness: 13.79 mm; Case diameter: 42 mm; Case: Steel; Dial color: Black; Crystal: Flat scratch-resistant sapphire crystal with anti-reflective treatment on both sides; Water resistance: 60 bar (600 metres / 2000 feet); Total product weight (approx.): 177 g; Caliber: Omega 8912; Movement type: Self winding; Power reserve: 60 hours; Bracelet material: Steel; Type of Clasp: Foldover clasp with comfort setting and diver extension — retrieved 2026-09-23
Not affiliated with OMEGA. Specifications are read from each manufacturer's own published documentation on the dates shown and may change; the manufacturer's current documentation governs.