Which Tissot Seastar to buy: 1000 vs 2000, and Seastar vs PRX (2026)

For most people, the best Tissot Seastar is the Seastar 1000 Powermatic 80 in 40mm: an automatic with an 80-hour power reserve and 300 metres of water resistance. For less, the 40mm quartz. If you dive seriously, the Seastar 2000, rated to 600 metres.

Every watch here is sold new by Goldsmiths, a UK authorised Tissot retailer. Prices are Goldsmiths' own on the date shown.

How we chose

We went through the Seastars Goldsmiths has in stock, more than 30 of them, and read Tissot's own UK product pages for each size: thickness, weight, water resistance and power reserve. We earn a commission if you buy through our links, which never changes the price you pay.

Every Seastar compared

Figures are Tissot's own, from its UK product pages; prices are Goldsmiths' for the version shown, on a steel bracelet.

The quartz Seastars are much slimmer, under 10mm, so they're easy to wear every day. The Powermatic 80s add an automatic movement with an 80-hour power reserve, for a few hundred pounds more. The Seastar 2000 is a different class: twice the water resistance, and a much thicker and heavier watch.

The best Tissot Seastar overall: Seastar 1000 Powermatic 80, 40mm

Tissot lists the Powermatic 80 automatic with a Nivachron™ balance spring and up to 80 hours of power reserve, a sapphire crystal and 300 metres of water resistance with a screw-down crown, in a 40mm case 12.48mm thick and 148g. It's a real dive watch in a size that suits most wrists.

Best Seastar overallTissot Seastar 1000 Powermatic 80 T1208071105100 · 40mm · Automatic · 300 m water resistant £685Price at Goldsmiths, 28 October 2026 Full specsSee it at Goldsmiths

It also comes with a turquoise dial and on a canvas strap.

Discover Tissot 361 watches at Goldsmiths, £245 to £1,875. Discover all 361

The best value Seastar: Seastar 1000 quartz, 40mm

The least expensive way into the Seastar at 40mm. Tissot gives it 9.97mm thick, much slimmer than the automatic, with a sapphire crystal and 300 metres of water resistance.

Best value SeastarTissot Seastar 1000 T1204101104100 · 40mm · Quartz · 300 m water resistant £425Price at Goldsmiths, 28 October 2026 Full specsSee it at Goldsmiths

The best Seastar for smaller wrists: 36mm

The 36mm Seastar 1000 quartz is 9.67mm thick and weighs 114g, according to Tissot, with a sapphire crystal that's anti-reflective on both sides and the same 300 metres of water resistance. It suits small wrists and is a good choice for women.

Best for smaller wristsTissot Seastar 1000 T1202101104100 · 36mm · Quartz · 300 metres (30 bar) water resistant £390Price at Goldsmiths, 28 October 2026 Full specsSee it at Goldsmiths

The best for serious divers: Seastar 2000 Professional

Tissot's professional diver: rated to 60 bar (600 metres) and certified to the ISO 6425 diving standard, with a ceramic bezel and a helium valve, according to Tissot. Inside is a Swiss automatic with a Nivachron™ balance spring and an 80-hour power reserve. It's a big watch: 44mm, 15.29mm thick and 209g, according to Tissot, so try it on first.

Best for serious diversTissot Seastar 2000 T1209071105100 · 44mm · Automatic · 600 metres (60 bar) water resistant £900Price at Goldsmiths, 28 October 2026 Full specsSee it at Goldsmiths

The Seastar 2000 also comes on a rubber strap, including in orange.

The best Seastar chronograph: 38mm quartz

A 38mm quartz chronograph, water resistant to 300 metres, according to Goldsmiths. For a bigger chronograph, the 45.5mm Seastar 1000 Chronograph is also sold by Goldsmiths.

Best Seastar chronographTissot Seastar 1000 Quartz Chronograph T1202171106100 · 38mm · Quartz · 300 m water resistant £520Price at Goldsmiths, 28 October 2026 Full specsSee it at Goldsmiths

Seastar or PRX?

They cost about the same, but they're very different watches. The Seastar is a dive watch, with a rotating bezel and 300 metres of water resistance. The PRX is a slim 1970s-style steel watch with an integrated bracelet: Tissot gives the 40mm PRX Powermatic 80 as 10.93mm thick and water resistant to 100 metres, which is still fine for swimming. Both have the same 80-hour Powermatic 80. Choose the Seastar if you'll be in the water a lot, the PRX if you want one watch that also works with a suit.

Tissot PRX Powermatic 80 T1374071104100 · 40mm · Automatic · 100 m water resistant £640Price at Goldsmiths, 28 October 2026 Full specsSee it at Goldsmiths

For every PRX size compared, see which Tissot PRX to buy.

Seastar or something else?

For a Swiss diver from a bigger brand, see which Longines HydroConquest to buy; for more under £1,000, our best dive watches under £1,000. For the rest of Tissot's range, see our best Tissot watches.