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Tissot Seastar 1000 Chronograph 45.5mm Mens Watch Grey
Ref. T1204171708101
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Stepping up in Tissot's range
The Seastar name goes back to 1954, when Tissot introduced a caseback engineered to seal against moisture — a preoccupation that eventually became the marque of a whole line built around water resistance. The modern Seastar 1000 Chronograph carries that logic to its conclusion: screw-down crown, screw-down pushers that prevent accidental chronograph activation at depth, and a case rated to 300 metres. The quartz movement is a deliberate choice here rather than a concession — the ETA G10.212 keeps daily variation within ±0.1 seconds and adds an end-of-life indicator, both useful properties in a watch that might actually go diving. At 45.5mm this is an unambiguously large watch, but the downturned lugs and 12.8mm profile — kept slim by the quartz calibre — mean it settles against the wrist rather than sitting proud of it. The grey dial and grey textile-over-rubber strap give this variant a more restrained reading than the colour-forward versions in the range; the orange accent comes in only on the aluminium bezel, where it marks the elapsed-time scale. The convex sapphire, double-AR coated on both faces, keeps the sub-dials — 1/10-second, 60-second, 30-minute — legible at an angle without glare competing with them.
- Reference
- T1204171708101
- Brand
- Tissot
- Collection
- Seastar
- Case size
- 45.5mm
- Case thickness
- 12.8mm
- Lug width
- 22mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Grey
- Crystal
- Sapphire
- Bezel
- Unidirectional rotating
- Movement
- Automatic
- Calibre
- ETA G10.212
- Functions
- Chronograph, Date
- Water resistance
- 300m
- Bracelet / strap
- Rubber strap
- Strap colour
- Grey
- Clasp
- Folding clasp
- Lume
- Super-LumiNova
- Retailer
- Mappin & Webb
Additional specifications
- Lug-to-lug
- 51mm
Learn more about Tissot
Charles-Félicien Tissot and his son Charles-Émile founded the company in Le Locle in 1853, assembling gold pocket watches and, unusually for the time, exporting aggressively — Russia became a major market within a decade.
Tissot's history is a sequence of firsts achieved through willingness to try materials and ideas the establishment considered unserious. The first mass-produced pocket watch with two time zones came in 1853. The first anti-magnetic wristwatch in 1930. The Astrolon of 1971 was the first watch with a movement made largely of injection-moulded plastic, and it worked. The RockWatch of 1985 used Alpine granite for the case, followed by watches in wood and mother-of-pearl.
The T-Touch of 1999 was the most significant: a tactile sapphire crystal allowing the wearer to access altimeter, barometer, compass, thermometer, and chronograph by touching the glass, years before touchscreens were commonplace.
Tissot merged with Omega in 1930 and both became founding members of what is now the Swatch Group. Its position in the group is volume and accessibility — Swiss mechanical and quartz watches at prices most people can reach, with the Powermatic 80 movement offering an eighty-hour reserve at entry level.
The company has held timekeeping roles across cycling, basketball, motorsport, and fencing.
- 1853
- Founded in Le Locle by Charles-Félicien and Charles-Émile Tissot.
- 1930
- Merges with Omega; releases the first anti-magnetic wristwatch.
- 1971
- The Astrolon uses a plastic movement.
- 1985
- The RockWatch is cased in Alpine granite.
- 1999
- The T-Touch introduces a tactile sapphire crystal.
Also in 7 collections
This watch appears in the Tissot Seastar range (53), Back in Stock (4,007), Stainless Steel Watches (2,833), Automatic Watches (1,417), Chronograph Watches (1,131), Watches 44mm and Over (810) and Sports Watches (667).
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What the specifications mean
A mechanical watch built to be worn hard and got wet.
Strengths
- 300m water resistance, rated for actual diving
- 51mm lug-to-lug keeps the 45.5mm case wearable
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
Worth knowing
- 45.5mm is a large watch with real presence
Tissot Seastar 1000 alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | T1204171708101 | SPB101J1 | GM-B2100BD-1AER |
|---|---|---|---|
| Price | £550 | £546 | £549 |
| Case size | 45.5mm | 45mm | 44mm |
| Water resistance | 300m | 200m | 200m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Rubber strap | Stainless steel bracelet | Stainless steel bracelet |
| Power reserve | — | 70 hours | — |
| This watch |
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Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 300m it is rated for swimming, snorkelling and recreational diving.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
Quartz, automatic and solar comparedWhat size strap does it take?
22mm. Any strap of that width will fit, and on most modern watches quick-release bars make the swap a two-minute job with no tools.
Will it fit my wrist?
Lug-to-lug is 51mm, which suits wrists from roughly 17.5cm (7 inches) upward.
Lug-to-lug decides fit more than case diameter does.
How to size a watch to your wristIs it a men's or women's watch?
Listed as men's.
Cheapest place to buy
Both Mappin & Webb and Goldsmiths list it at £550, so choose on delivery and warranty rather than price.
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