The 2024 40 mm Tissot Seastar 1000 Powermatic 80 adds a more compact case profile and vertically brushed gradient dials to the familiar automatic dive-watch formula. For the black-dial steel-bracelet version, reference T1208071105100, Tissot lists an 80-hour power reserve and water resistance of 30 bar (300 m / 1,000 ft). Those are manufacturer specifications, not independent test results; the available material does not establish personal wear impressions or a measured accuracy verdict.
Which Seastar 1000 is this?
This article focuses on the 40 mm Powermatic 80 extension announced in May 2024, not every watch sold under the Seastar 1000 name. Tissot Australia described the extension as five new 40 mm Powermatic 80 models. The official US listing identifies the black-dial steel-bracelet version as reference T1208071105100. Tissot’s US product page is the reference for the specifications and US-listed price discussed here; colors, configurations, availability, and prices can differ by market.
The Seastar 1000 family also includes a larger 43 mm Powermatic 80 automatic and quartz versions. The more capable Seastar 2000 Professional is a separate model, not another name for this 40 mm watch.
What changed with the 40 mm extension?
Tissot describes a notch along the case edges as a design change intended to make the watch appear more compact. The company also introduced vertically brushed dials that fade to black at the edges, Super-LumiNova-coated hands and markers, and a unidirectional steel bezel with a color-printed mineral glass ring. These are advertised collection features and design updates, not the results of an independent comparison with an earlier model. Tissot’s pressroom announcement describes the case change; its Australian announcement dates the launch to May 2024 and identifies five models in the extension. Tissot Australia’s Seastar announcement
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- These timepieces are perfect for those in search of a sporty yet assertive accessory, offering water resistance up to 1000 feet (300 meters) and improved visibility in dim conditions thanks to the Super-LumiNova coated hands and hour markers.
Published specifications for T1208071105100
The figures below are Tissot’s published specifications for this specific US-listed black-dial bracelet reference, rather than independent measurements.
| Specification | Tissot’s listing |
|---|---|
| Case | 40 mm stainless steel; 12.48 mm thick; 20 mm lug width |
| Bezel | Unidirectional rotating bezel with a mineral ring |
| Crystal | Sapphire, with anti-reflective coating on the underside |
| Case construction | Screw-down crown and caseback; see-through caseback |
| Water resistance | 30 bar / 300 m / 1,000 ft, as stated by Tissot |
| Movement | Swiss automatic; up to 80 hours of power reserve; date; patented Nivachron balance spring |
| Dial and bracelet | Super-LumiNova on hands and markers; interchangeable quick-release steel bracelet |
| US listed price | $875 when Tissot’s US page was retrieved on October 8, 2026; verify current price and availability |
The 30 bar rating is the manufacturer’s stated specification. The model-specific material cited here does not establish ISO 6425 certification, nor does a depth rating by itself establish a safe real-world dive depth. Tissot describes its water-resistance testing process, but that should not be confused with independent testing of this reference.
Rank #2
- Tissot T-Sport Automatic Blue Dial Unisex Watch T1208073704100
40 mm or 43 mm: what the published figures show
Tissot’s Malaysia listing for the 43 mm Powermatic 80 reference T1204071104100 gives a useful same-family comparison. It is a different reference and regional listing, so its details should not be assumed to apply to every 43 mm version.
| Published detail | 40 mm T1208071105100 | 43 mm T1204071104100 |
|---|---|---|
| Case diameter | 40 mm (Tissot US) | 43 mm (Tissot Malaysia) |
| Thickness | 12.48 mm (Tissot US) | 12.70 mm (Tissot Malaysia) |
| Lug width | 20 mm (Tissot US) | 21 mm (Tissot Malaysia) |
| Bezel ring | Mineral (Tissot US) | Ceramic (Tissot Malaysia) |
| Power reserve | Up to 80 hours (Tissot US) | Up to 80 hours (Tissot Malaysia) |
The official figures establish differences in diameter, thickness, lug width, and the listed bezel-ring material. They do not establish how either watch will fit a particular wrist. If possible, try both on before choosing: the 3 mm diameter difference and 1 mm lug-width difference can matter in wear, but no wrist-fit test is available here. The 20 mm width and quick-release bracelet detail apply to the cited 40 mm reference; check the exact model and release interface before buying another strap or bracelet. Tissot Malaysia’s 43 mm listing
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- Case Size: 44.00 mm, Band Width: 22 mm, Case Thickness: 15.29 mm
- Swiss Automatic Movement, HMSD (Hour, Minute, Second, Date), 316 stainless steel case, power reserve up to 80 hours
- Water-resistant up to a pressure of 60 bar (600 m / 2000 ft)
- see-through caseback, caseback with sapphire crystal, screw-down crown and caseback, ceramic bezel ring, helium valve, anti-clockwise rotating bezel
- Domed scratch-resistant sapphire crystal with antireflective coating, Super-LumiNova dial
What can—and can’t—be said about it hands-on?
A WatchChris video dated March 17, 2024, is discoverable under a matching hands-on title and description, but the available result does not include a detailed transcript. It therefore does not substantiate specific claims about wrist comfort, finishing, bezel action, accuracy, or other firsthand observations. No independent accuracy measurements or reserve tests are established in the cited material. The strongest grounded assessment is limited to the design changes and specifications Tissot publishes; “up to 80 hours” is the brand’s stated reserve, not a measured result reported here.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Price and availability
Tissot’s US listing showed $875 for reference T1208071105100 when retrieved on October 8, 2026. That is a time- and region-specific listing, not a guaranteed current price or a claim about availability elsewhere. Check Tissot’s local product page or an authorized retailer for current stock and pricing.
Quick Recap
Best Value
- Case Size: 44.00 mm, Band Width: 22 mm, Case Thickness: 15.29 mm
- Swiss Automatic Movement, HMSD (Hour, Minute, Second, Date), 316 stainless steel case, power reserve up to 80 hours
- Water-resistant up to a pressure of 60 bar (600 m / 2000 ft)
- see-through caseback, caseback with sapphire crystal, screw-down crown and caseback, ceramic bezel ring, helium valve, anti-clockwise rotating bezel
- Domed scratch-resistant sapphire crystal with antireflective coating, Super-LumiNova dial
Rank #4
- Case Size: 43.00 millimeters; Bandwidth: 21 millimeters; Case Thickness: 12.70 millimeters
- Swiss automatic movement, 316L stainless steel case, Index dial type, date
- Rubber bracelet, standard buckle closure
- Water-resistant up to a pressure of 30 bar (300 meter / 1000 feet): Suitable for short periods of recreational swimming and showering, but no diving or snorkeling.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
