Tissot / Dive$484.50Current price
Seastar 1000 Quartz Black
A 300 m Swiss quartz diver
Seastar 1000 Quartz Black
or T028 37mm PT5000 Automatic Dive Watch (Black Dial)?
Both have sapphire and a screw-down crown. Choose the Tissot Seastar at $484.50 for a Swiss quartz, 300 m rating and a slim 9.97 mm case; choose the Thorn T028 at $199 for a PT5000 automatic, 200 m and a 37 mm case.
Thorn Watches / Diver$194After codeBefore code$199Save $5
T028 37mm PT5000 Automatic Dive Watch (Black Dial)
A compact black-dial diver with two interchangeable bezels.
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Choose the Seastar 1000 Quartz Black for
- More water resistance: 300 m vs 200 m
- Slimmer: 9.97 mm vs 13.2 mm
- More wrist presence at 40 mm
- Quartz accuracy, no winding
- Watch Ritual code SEBASTIANBASSOL supplied for 10% off
Choose the T028 37mm PT5000 Automatic Dive Watch (Black Dial) for
- Costs $285.50 less at its listed price
- Smaller case for slimmer wrists: 37 mm vs 40 mm
- Mechanical automatic movement
- Watch Ritual code SEBASTIANBASSOL tested: $194 before shipping
The specs, side by side.
Seastar 1000 Quartz BlackT028 37mm PT5000 Automatic Dive Watch (Black Dial)
Listed price$484.50 at Watches of America$199 at Thorn Watches
Case diameter40 mm37 mm
Thickness9.97 mm13.2 mm
Lug-to-lugNot published46.6 mm
MovementSwiss quartz, three hands with datePT5000 automatic
Power reserveBattery (quartz)Not published
Water resistance300 m200 m
CrystalSapphire with double antireflective coatingSapphire crystal with anti-reflective coating
Strap / braceletStainless-steel bracelet, folding clasp with safety lock, quick-releaseStainless-steel bracelet; seller also lists a bonus leather strap
Who should buy which.
The Seastar 1000 Quartz Black: Someone who wants a real dive watch for swimming and snorkelling that also works as an everyday watch. Choose an automatic diver if you want a mechanical movement, or a larger case if you prefer a bigger watch.
The T028 37mm PT5000 Automatic Dive Watch (Black Dial): A buyer who wants a black-dial automatic diver in a vintage-leaning 37 mm case, with a warm bezel and an included alternate strap-and-bezel kit. Choose a thinner or shorter-span watch if you want a low-profile cuff fit; choose a model with formal dive certification if certification is a purchase requirement.
Before you order.
It is a quartz watch, so the battery will eventually need replacing, and it is priced above many automatic divers. Tissot lists a 40 mm case; if you prefer a larger dive watch, look elsewhere.
A 37 mm diameter does not make this a flat-wearing watch: the 46.6 mm lug-to-lug span and 13.2 mm thickness deserve a fit check.
A few good questions.
Should I buy the Tissot Seastar 1000 Quartz Black or the Thorn Watches T028 37mm PT5000 Automatic Dive Watch (Black Dial)?
Both have sapphire and a screw-down crown. Choose the Tissot Seastar at $484.50 for a Swiss quartz, 300 m rating and a slim 9.97 mm case; choose the Thorn T028 at $199 for a PT5000 automatic, 200 m and a 37 mm case.
Which is cheaper, the Tissot Seastar 1000 Quartz Black or the Thorn Watches T028 37mm PT5000 Automatic Dive Watch (Black Dial)?
The Thorn Watches T028 37mm PT5000 Automatic Dive Watch (Black Dial) is listed at $199, against $484.50 for the Tissot Seastar 1000 Quartz Black, checked 2026-10-17 and 2026-10-16.
Which is more water resistant, the Tissot Seastar 1000 Quartz Black or the Thorn Watches T028 37mm PT5000 Automatic Dive Watch (Black Dial)?
The Tissot Seastar 1000 Quartz Black is rated to 300 m, against 200 m for the Thorn Watches T028 37mm PT5000 Automatic Dive Watch (Black Dial).
Is there a discount code for the Tissot Seastar 1000 Quartz Black or the Thorn Watches T028 37mm PT5000 Automatic Dive Watch (Black Dial)?
SEBASTIANBASSOL is our supplied code for 10% off at Watches of America; confirm it applies at checkout. SEBASTIANBASSOL is our supplied code for $5 off at Thorn Watches; it lowered the Thorn Watches T028 37mm PT5000 Automatic Dive Watch (Black Dial) to $194 in our test.
More head-to-heads.
- Tissot Seastar 1000 Quartz vs Citizen Promaster Dive
- Thorn T028 vs BODERRY Admiral
- Thorn SHY027 vs T028
- THORN T023 V3.1 Cream White vs T028 Black
- Thorn T028 vs Citizen Promaster NY0086
- Thorn T014 vs T028
Specs: Tissot product page (checked October 17, 2026) and THORN Watches product page (checked October 16, 2026). Prices are the listed prices at the store each shop button opens.