ThornT023
Homage to the Tudor Submariner 7021
about$219
Regular price at the brand's own website, checked 31 Oct 2026. Marketplace prices change often.
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The Thorn T023 V3.1 Blue is a homage to the Tudor Submariner 7021, with the same 40 mm case size. It uses an automatic movement and is water resistant to 200 m. It costs about $219 at the official store.
Side by side with the original
Compared with reference 7021/0. Values marked ≈ are estimates, such as a reviewer's measurement.
| Spec | T023 | Submariner 7021 (7021/0) | Difference |
|---|---|---|---|
| Case diameter | 40 mm | 40 mm | same |
| Lug-to-lug | 46.6 mm | Not published | Can't compare |
| Thickness | 12.3 mm | Not published | Can't compare |
| Lug width | ≈ 20 mm | Not published | Can't compare |
| Water resistance | 200 m | Not published | |
| Movement | Automatic, PT5000 | Automatic, 2484 | |
| Power reserve | Not published | Not published | |
| Crystal | Sapphire, inner anti-reflective coating, domed | Acrylic, cyclops | |
| Bezel | Rotating, Aluminium | Rotating, Blue (fades with age) | |
| Case material | 316L stainless steel | Stainless steel | |
| Lume | C3 lume | Not published | |
| Bracelet | 20 mm stainless steel bracelet with tool-less link adjustment | Steel Oyster bracelet | |
| Weight | 129 g | Not published |
- ≈ T023, Lug width: median of 2 agreeing independent measurements (20 mm); the maker does not publish it.
The original
Tudor
Submariner 7021
Reference 7021/0, vintage, blue dial, date, steel oyster bracelet
- Case
- 40 mm
- Lug-to-lug
- Not published
- Thickness
- Not published
- Water resistance
- Not published
- Movement
- Automatic, 2484
- List price
- Not published
Why it scores as it does
Proportions and movement are computed from specs. Design details and functions are judged from the brand's official images. How we score
Lug-to-lug is neither published nor measured for one of the two watches, so there is not enough data to score.
Proportions— / 30
- Case diameter12 / 12Same size
- Lug-to-lug0 / 8Not published, left out
- Thickness0 / 6Not published, left out
- Lug width0 / 4Not published, left out
Design signatures— / 40
- Angular snowflake hour and minute hands5.5 / 11Angular hour hand with a square lume plot and a lume-filled straight minute hand in the official images; the minute hand is plainer than the original's.
- Square luminous hour markers10 / 10Square luminous markers with a triangle at 12 on the blue dial.
- Date window at 3 with magnifying bubble3.5 / 7Date window at 3 on the blue dial; no magnifying bubble is visible in the official images.
- Roulette date wheel alternating red and black numerals0 / 4The date disc in the official images shows plain dark numerals on white, not alternating red and black.
- Rotating bezel with coloured insert5 / 5Rotating bezel with an aluminium insert in blue-grey and bold numerals.
- Steel Oyster bracelet3 / 3Riveted-style three-link steel bracelet in the official images.
Functions and materials— / 20
- Complications8 / 8Date at 3, as on the original.
- Bezel action2 / 4Rotating bezel; the brand gives no direction or click count for this listing, while the original is bidirectional.
- Case and bezel materials4 / 4Steel case and bracelet with an aluminium bezel insert, as on the original.
- Crystal shape and date window2 / 4Domed sapphire with a plain date window; the original has an acrylic crystal with a cyclops.
Movement type— / 10
- Movement type10 / 10Same movement type.
What reviewers and owners say
We haven't read enough independent reviews of this model to summarise them yet.
Good
- Vintage 40 mm case with a short 46.6 mm lug to lug
- Domed sapphire crystal
- Crisp dial printing and raised lume plots
- 20 mm lug width for easy strap changes
- Bracelet adjusts without tools (brand listing)
Less good
- Lume on the hands is weaker than on the markers
- No cyclops over the date
- Brand does not say whether the bezel is bidirectional
Earlier versions
- V2.1 (still listed): The V2.1 listing sells the same 40 mm case with a bracelet the brand calls upgraded; its blue dial carries different dial text from the V3.1 blue dial. The V3.1 listing adds a bracelet that adjusts without tools.
Sources
Checked 31 Oct 2026. Every figure on this page comes from one of these pages.