On Holden’s list, Probably Want At Some Point
Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm
The Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm (210.30.42.20.01.001) is a dive watch from Omega: a 42 mm stainless steel case, 13.7 mm thick and 50 mm lug to lug, with an automatic Omega 8800 movement and 300 m water resistance.
Going by its 50 mm lug to lug, it should sit within the flat top of a wrist of about 6.8 inches (17.2 cm) or larger.
Research found it at $6,700 list in the US (checked August 2026).
Specifications
From the research, with the sources for each group of facts. Unknown means no source confirmed it.
| The watch [1][2][3] | |
|---|---|
| Brand | Omega |
| Reference | 210.30.42.20.01.001 |
| Category | Diver |
| Production | Current |
| Case and size [1][4][2][3] | |
| Case diameter | 42 mm |
| Lug to lug | 50 mm |
| Thickness | 13.7 mm |
| Lug width | 20 mm |
| Case material | Stainless steel |
| Crystal | Sapphire |
| Water resistance | 300 m |
| Weight | Unknown |
| Movement [1][4][3] | |
| Movement | Omega 8800, automatic |
| Power reserve | 55 h |
| Accuracy | METAS Master Chronometer: 0/+5 s/day standard |
| Bracelet [1][2] | |
| Bracelet or strap | Brushed and polished stainless steel 'Tank Tread'-style bracelet |
| Clasp | Brushed/polished folding clasp - 'among the beefiest and most secure' (HiConsumption) |
| Price and warranty (US) [4][2][3] | |
| List price (US) | $6,700 (authorized dealer, 2026-08) |
| Street price (US) | Unknown |
| Used price (US) | Not independently re-verified |
| Warranty | 5-year Omega warranty |
Will it fit?
A watch wears comfortably when its lugs stay on the flat top of the wrist. Here is the 50 mm lug to lug against the flat top estimated for common wrist sizes.
| Wrist | Flat top | Fit |
|---|---|---|
| 6 in 15.2 cm | 47 mm | Likely overhangs |
| 6.5 in 16.5 cm | 51 mm | At the edge |
| 7 in 17.8 cm | 55 mm | Comfortable |
| 7.5 in 19.1 cm | 59 mm | Comfortable |
| 8 in 20.3 cm | 63 mm | Comfortable |
Check it against your own wrist An estimate, not a guarantee; how the method works is on the tool page.
What the research found
These are the research’s judgments, scored against Holden’s priorities, not his own words.
Strengths
- Ceramic dial and bezel with laser-engraved waves - material execution well above price peers [1]
- METAS Master Chronometer 8800 with 15,000 gauss resistance [1]
- Excellent underwater legibility and genuine dive credentials incl. HEV [4]
- Very secure, beefy clasp and comfortable bracelet [2]
Weaknesses
- Large on paper: 42mm x 13.7mm x 50mm lug-to-lug [4]
- Scalloped bezel harder to grip with gloves than gear-tooth designs [4]
- Helium escape valve at 10 o'clock is functionally unnecessary for recreational wear and divides opinion aesthetically
- Bracelet styling reads dated to some critics [2]
Research scores, 0 to 10
| Execution and feel in the hand | 9.0 |
|---|---|
| Design identity | 8.3 |
| Value at a realistic price | 8.5 |
| Long-term ownership | 9.0 |
| Movement and engineering | 9.0 |
| Wearability and proportions | 7.3 |
| Versatility and durability | 8.4 |
| Fit with Holden's collection | 6.5 |
Also on Holden’s list
Other diver watches on his list.
- Tudor Pelagos LHD 25610TNL-0001
- Grand Seiko Spring Drive U.F.A. Ushio 300 Diver SLGB023
- Traser P67 Diver Blue 109375
- Squale 1545 Grey 1545GG.AC
- Glycine Combat Sub 42 GL0533
Sources
- Diver 300M Seamaster Steel Master Chronometer Certified Watch 210.30.42.20.01.001 | OMEGA US omegawatches.com · read August 26, 2026
- Hands-on Review: Omega Seamaster Professional Diver 300M Watch hiconsumption.com · read August 26, 2026
- Omega Seamaster Diver 300M Co-Axial Master Chronometer Black Dial Bracelet 210.30.42.20.01.001 - product listing exquisitetimepieces.com · read August 26, 2026
- Omega Seamaster Diver 300M - Underwater Dive Review (Specs & Price) monochrome-watches.com · read August 26, 2026
Personal research, not a source of truth. Spotted an error? Email a correction.