
Tap the image to enlarge

Tissot Seastar 1000 Chronograph T120.417.11.051.01 Men's Watch – 45.5mm Black Dial Stainless Steel
Ref. T120.417.11.051.01
See more premium optionsHide
Stepping up in the same colour and case shape
A 45.5mm round case in 316L stainless steel houses a black dial with chronograph sub-dials, a date display, and Super-LumiNova hands and markers. The sapphire crystal carries a double-sided antireflective coating on both surfaces. A unidirectional rotating aluminium bezel sits above a case measuring 12.8mm thick, and the 22mm lug width feeds into a matching stainless steel bracelet fitted with a folding clasp that includes both a safety lock and a diver extension. Water resistance is rated to 300 metres. The ETA G10.212 quartz movement also features an end-of-life indicator. At 180g, it wears with considerable solidity.
- Reference
- T120.417.11.051.01
- Brand
- Tissot
- Collection
- Seastar
- Case size
- 45.5mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Black
- Crystal
- Sapphire
- Bezel
- Unidirectional rotating
- Movement
- Quartz
- Calibre
- ETA G10.212
- Functions
- Chronograph, Date, Small seconds
- Water resistance
- 300m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Folding clasp
- Lume
- Super-LumiNova
- Retailer
- Watch Enclave
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 6 collections
This watch appears in Stainless Steel Watches (2,562), Chronograph Watches (1,107), Watches 44mm and Over (872), Sports Watches (647), Dive Watches (454) and Back in Stock (148).
International shipping available
What the specifications mean
A watch built to be worn hard and got wet.
Strengths
- 300m water resistance, rated for actual diving
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
- Sits in the lower half of Tissot's range as we list it
Worth knowing
- 45.5mm is a large watch with real presence
Compare alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | T120.417.11.051.01 | 1514314 | MTIB1F501 |
|---|---|---|---|
| Price | £399 | £379 | £400 |
| Case size | 45.5mm | 44mm | 45mm |
| Water resistance | 300m | — | 100m |
| Movement | Quartz | Quartz | Quartz |
| Strap | Stainless steel bracelet | Stainless steel bracelet | Stainless steel bracelet |
| This watch |
|
|
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.
Will the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Does it need a battery?
Yes. It is quartz, so expect a battery change every two to three years at a jeweller.
Is it a men's or women's watch?
Listed as men's.
Cheapest place to buy
Watch Enclave is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.
You may also like
In stock, and close on style and price












