Quick Verdict
The Seastar 1000 is the most capable dive specification under $1,000: 300 m, a ceramic bezel, sapphire with anti-reflective coating and an 80-hour Swiss automatic. It is also the largest watch in this database, and the 50 mm lug-to-lug is what decides whether it is an option for you.
At a Glance
- Street price
- $795
- Movement type
- Automatic
- Power reserve
- 80 hours
- Case diameter
- 43 mm
- Lug-to-lug
- 50 mm
- Crystal
- Sapphire with anti-reflective coating
- Water resistance
- 300 m (984 ft)
Design
A conventional but well-executed diver, with a broad ceramic bezel and a wave-textured dial on most references. It is considerably more assertive than the PRX and is clearly designed to be recognised as a dive watch.
Movement
The same Powermatic 80 as the PRX: an ETA C07.111 base running at 21,600 vph for an 80-hour reserve. Tissot does not publish a daily rate for the standard version.
Build Quality
Screw-down crown, screwed caseback, 300 m rating and a ceramic bezel insert that will not fade or scratch the way aluminium does. This is the best-built watch in the database on specification.
Dial
Applied indices with heavy luminous fill, a date at three and anti-reflective treatment on the sapphire. The wave pattern is subtle in most lighting and pronounced in direct sun.
Bracelet & Strap
Depending on reference, a tapering steel bracelet with a diver's extension or a rubber strap. The 22 mm lug width means aftermarket options are plentiful, unlike the integrated PRX.
Comfort & Wearability
The limiting figure is 50 mm lug-to-lug, the longest here. Combined with 13 mm of height and 190 g of mass, this is a watch that needs a wrist of about 7 inches to sit correctly.
Accuracy
As with the PRX, Tissot publishes no rate specification for the standard Powermatic 80. The 80-hour reserve is the movement's defining practical advantage.
What we like
What we like
- 300 m water resistance, deeper than any other watch here
- Ceramic bezel insert rather than aluminium
- 80-hour power reserve from the Powermatic 80
- Sapphire with anti-reflective treatment
What we don't like
- 50 mm lug-to-lug rules it out for smaller wrists
- 190 g on the bracelet is the heaviest here
- 13 mm plus a helium-era case profile makes it a poor fit under a cuff
Who Should Buy It?
Anyone who wants a Swiss dive watch that genuinely out-specifies the Japanese competition, and anyone with a larger wrist looking for presence.
Who Should Skip It?
Skip it if your wrist is under 6.75 inches. Skip it if you want one watch for everything — the PRX does that job far better.
Best Alternatives
Three watches worth weighing up before you commit.
How It Compares
Tissot Seastar 1000 Powermatic 80
4 categories won
Seiko Prospex Turtle SRPE93
3 categories won
- Street price
- $795
- $425Winner
- Movement type
- Automatic
- Automatic
- Caliber
- Powermatic 80
- 4R36
- Power reserve
- 80 hoursWinner
- 41 hours
- Stated accuracy
- Not published
- -35 to +45 seconds per day (Seiko specification)
- Case diameter
- 43 mm
- 45 mm
- Case thickness
- 13 mmWinner
- 13.2 mm
- Lug-to-lug
- 50 mm
- 47.7 mmWinner
- Crystal
- Sapphire with anti-reflective coatingWinner
- Hardlex mineral
- Water resistance
- 300 m (984 ft)Winner
- 200 m (656 ft)
- Bracelet / strap
- Steel bracelet (bracelet reference T605046721)
- Black silicone strap
- Weight
- 190 g
- Not published
- Style
- Diver · Sport
- Diver · Sport
- Recommended wrist
- Medium · Large
- Medium · Large
- Selection Score
- 86 / 100
- 87 / 100Winner
Final Verdict
On specification the Seastar 1000 beats every other diver here, and the ceramic bezel and 300 m rating justify the premium over a Seiko Turtle. The size is the deciding factor, and it is not a small one.
Specifications
- Brand
- Tissot
- Model
- Seastar 1000 Powermatic 80
- Reference
- T120.407.11.041.03
- Collection
- Seastar
- Street price
- $795
- MSRP
- $875
- Movement type
- Automatic
- Movement
- Tissot Powermatic 80
- Caliber
- Powermatic 80
- Power reserve
- 80 hours
- Stated accuracy
- Not published
- Balance spring
- Nivachron
- Case diameter
- 43 mm
- Case thickness
- 13 mm
- Lug-to-lug
- 50 mm
- Lug width
- 22 mm
- Weight
- 190 g
- Case material
- Stainless steel
- Crystal
- Sapphire with anti-reflective coating
- Water resistance
- 300 m (984 ft)
- Dial colours
- Blue
- Bracelet / strap
- Steel bracelet (bracelet reference T605046721)
- Bracelet material
- Stainless steel
- Clasp
- Folding clasp with diver's extension
- Date
- Yes
- GMT
- No
- Chronograph
- No
- Style
- Diver · Sport
- Recommended wrist
- Medium · Large
- Country of origin
- Switzerland
- Released
- 2019
- Selection Score
- 86 / 100
Score Breakdown
- 25%21.0
Value
- 20%18.4
Movement
- 15%13.5
Build Quality
- 15%12.6
Design
- 10%7.6
Wearability
- 10%8.8
Features
- 5%4.4
Brand & Ownership
Seven pillars, each rated 0–10 and weighted as shown. The total is the sum of the weighted ratings — the headline number can never disagree with its own breakdown.
Ratings are demo data pending editorial review.
Where to Buy
Selection Time is reader-supported. If you buy through a link on this page we may earn a commission. This never affects our scores or what we recommend.
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Tissot
$875 · Price checked August 1, 2026
Frequently Asked Questions
Is the Seastar 1000 ISO 6425 certified?
Tissot rates the Seastar 1000 to 300 m. Confirm the ISO 6425 status of the specific reference with Tissot before relying on it for scuba, as certification is not applied uniformly across the range.
Seastar 1000 or Seiko Turtle?
The Seastar has sapphire, a ceramic bezel, 300 m and an 80-hour reserve. The Turtle is ISO 6425 certified, costs roughly half and has a much shorter lug-to-lug. Wrist size usually decides it.
