Omega Seamaster Diver 300M vs Tudor Black Bay
Omega Diver 300M 210.32.42.20.01.001 vs Tudor Black Bay 7941A1A0NU-0001, compared on the specs each brand publishes.
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The short answer
Two steel divers that buyers often cross-shop, compared on published specs.
- Case size: the Omega Diver 300M 210.32.42.20.01.001 is 1 mm larger (42 mm vs 41 mm).
- Thickness: the Tudor Black Bay 7941A1A0NU-0001 is 0.04 mm thicker (13.6 mm vs 13.56 mm).
- Water resistance: the Omega Diver 300M 210.32.42.20.01.001 is 100 m more (300 m vs 200 m).
- Power reserve: the Tudor Black Bay 7941A1A0NU-0001 is 15 hours longer (70 h vs 55 h).
- Calibre: Omega Diver 300M 210.32.42.20.01.001 has Omega 8800; Tudor Black Bay 7941A1A0NU-0001 has MT5602-U.
Side-by-side specs
| Spec | Omega Diver 300M 210.32.42.20.01.001 | Tudor Black Bay 7941A1A0NU-0001 |
|---|---|---|
| Case diameter | 42 mm | 41 mm |
| Thickness | 13.56 mm | 13.6 mm |
| Lug-to-lug | 49.9 mm | Not published by Tudor |
| Lug width | 20 mm | 21 mm |
| Calibre | Omega 8800 | MT5602-U |
| Movement | Automatic | Automatic |
| Power reserve | 55 h | 70 h |
| Water resistance | 300 m | 200 m |
| Crystal | Sapphire | Sapphire |
| Case material | Stainless steel | Stainless steel |
| Ships on | Rubber strap | Bracelet |
| Weight | 109 g | Not published by Tudor |
| US list price | $6,300 (US list) | Not stated |
| Dial | Black | Black |
| Certification | METAS Master Chronometer | METAS Master Chronometer |
| Status | In production | In production |
| Suits wrists of about our sizing guide | 16.9–18.7 cm | 16.4–18.3 cm |
Specs summarised in our own words from the brand's product pages: 210.32.42.20.01.001 source (checked 3 Nov 2026) 7941A1A0NU-0001 source (checked 3 Nov 2026). "Not published" means the brand page we checked doesn't list it, so we leave it blank rather than guess.
All the differences
- Case size: the Omega Diver 300M 210.32.42.20.01.001 is 1 mm larger (42 mm vs 41 mm).
- Thickness: the Tudor Black Bay 7941A1A0NU-0001 is 0.04 mm thicker (13.6 mm vs 13.56 mm).
- Water resistance: the Omega Diver 300M 210.32.42.20.01.001 is 100 m more (300 m vs 200 m).
- Power reserve: the Tudor Black Bay 7941A1A0NU-0001 is 15 hours longer (70 h vs 55 h).
- Calibre: Omega Diver 300M 210.32.42.20.01.001 has Omega 8800; Tudor Black Bay 7941A1A0NU-0001 has MT5602-U.
- Lug width: Omega Diver 300M 210.32.42.20.01.001 has 20 mm; Tudor Black Bay 7941A1A0NU-0001 has 21 mm.
- Features: only the Omega Diver 300M 210.32.42.20.01.001 has a date.
Wrist fit
Lug-to-lug decides overhang more than diameter does. Enter your wrist to see how each one should wear.
- Omega Diver 300M 210.32.42.20.01.001 –
- Tudor Black Bay 7941A1A0NU-0001 –
Same rule of thumb as Watch Finder: case diameter of about 23.5% of your wrist circumference (−2 mm to +2.5 mm), and lug-to-lug no longer than about 29% of it plus 1 mm. A guide, not a rule; flat or round wrists differ.
Strap fit
The Omega Diver 300M 210.32.42.20.01.001 has 20 mm lugs. The Tudor Black Bay 7941A1A0NU-0001 has 21 mm lugs. A strap bought for one won't fit the other. Size charts: Omega lug width chart · Tudor lug width chart.
Which should you buy?
It is the more compact case on paper (41 mm across). Our sizing guide puts it at about 16.4–18.3 cm.
It has the higher water-resistance rating: 300 m vs 200 m.
It has the longer published power reserve: 70 h.
Prices and where to buy
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More: All Omega Seamaster references · All Tudor Black Bay references.
Questions
Which is bigger, the Omega Diver 300M 210.32.42.20.01.001 or the Tudor Black Bay 7941A1A0NU-0001?
Per the brands, the Omega Diver 300M 210.32.42.20.01.001 is 42 mm across and the Tudor Black Bay 7941A1A0NU-0001 is 41 mm.
Which is more water-resistant?
Omega Diver 300M 210.32.42.20.01.001: 300 m. Tudor Black Bay 7941A1A0NU-0001: 200 m.
Have you tested these watches?
No. This comparison uses brand-published specs and our own analysis of them, not hands-on testing.
Watch.co is independent and not affiliated with any brand. We haven't handled these watches for this page: everything here comes from brand-published specs and our own analysis. Brand names are used only to identify products.