Tissot Seastar 1000 T1204101109100
Ref. T1204101109100 · Turquoise dial · In production
- Case40 mm
- Thick9.97 mm
- Water res.300 m
- MovementQuartz
- CrystalSapphire
Tissot Seastar 1000 T1204101109100 size, specs and price at a glance
The Tissot Seastar 1000 T1204101109100 is 40 mm wide and 9.97 mm thick. Tissot does not publish its lug-to-lug length. It takes 20 mm straps and ships on a bracelet. It is water resistant to 300 m. US list price: $515 when we last checked tissotwatches.com (3 Nov 2026).
Strap shopping? See our Tissot lug width chart.
Overview
The Tissot T1204101109100 is a diver watch from the Seastar collection, part of the Seastar 1000 family. It has a 40 mm stainless steel case, 9.97 mm thick. Tissot lists the dial as turquoise. Inside is a quartz movement. You also get 300 m water resistance, a sapphire crystal and a bracelet.
Who it suits
- Wrists of roughly 16.0–17.9 cm (6.3–7.0 in), by our Watch Finder sizing guide
- Swimming, snorkelling and diving
- Shirt cuffs and smarter dress codes
- Grab-and-go wear without winding or setting
Strengths
- Sapphire crystal resists scratches
- 300 m water resistance
- Screw-down crown helps keep water out
- Slim at 9.97 mm
Written by Watch.co from the published specs below. These are not owner reviews.
Full specifications
Case
| Case diameter | 40 mm | tissotwatches.com · 3 Nov 2026 |
|---|---|---|
| Thickness | 9.97 mm | tissotwatches.com · 3 Nov 2026 |
| Lug-to-lug | Not published by Tissot | |
| Case material | Stainless steel | tissotwatches.com · 3 Nov 2026 |
| Crystal | Sapphire | tissotwatches.com · 3 Nov 2026 |
| Water resistance | 300 m | tissotwatches.com · 3 Nov 2026 |
| Screw-down crown | Yes | tissotwatches.com · 3 Nov 2026 |
| Weight | 134 g | tissotwatches.com · 3 Nov 2026 |
Dial
| Dial colour | Turquoise | tissotwatches.com · 3 Nov 2026 |
|---|---|---|
| Date | Date | tissotwatches.com · 3 Nov 2026 |
Movement
| Movement type | Quartz | tissotwatches.com · 3 Nov 2026 |
|---|
Strap / Bracelet
| Bracelet / strap | Bracelet | tissotwatches.com · 3 Nov 2026 |
|---|---|---|
| Lug width | 20 mm | tissotwatches.com · 3 Nov 2026 |
Other
| US list price (MSRP) | $515 | tissotwatches.com · 3 Nov 2026 |
|---|---|---|
| Production status | In production | tissotwatches.com · 3 Nov 2026 |
| Made in | Switzerland | tissotwatches.com · 3 Nov 2026 |
| Style (our classification) | Diver | our classification |
Specs are summarised in our own words from the brand's product page. Each row links its source and the date we checked it. Fields we haven't verified are left out rather than guessed.
Variants with the same specs
Same case, movement and bracelet or strap; typically a different dial or finish.
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Questions about the Tissot Seastar 1000 T1204101109100
How big is the Tissot Seastar 1000 T1204101109100?
The case is 40 mm wide, 9.97 mm thick.
What movement does the Tissot Seastar 1000 T1204101109100 use?
It uses a movement, a quartz movement.
Can I swim with the Tissot Seastar 1000 T1204101109100?
Yes. It is rated to 300 m.
Does the Tissot Seastar 1000 T1204101109100 have a date?
Yes, it shows the date.
How much is the Tissot Seastar 1000 T1204101109100?
The US list price was $515 on tissotwatches.com when we checked on 3 Nov 2026. Prices change, so check before you buy.
Will the Tissot Seastar 1000 T1204101109100 fit my wrist?
By our sizing guide it sits best on wrists of about 16.0–17.9 cm (6.3–7.0 in). Use the fit checker on this page to test your own wrist.
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