Tissot Seastar 1000 Powermatic 80 vs Orient Kamasu Automatic Diver RA-AA0001B
The Tissot Seastar 1000 Powermatic 80 is the stronger diver: 300 m water resistance, an 80-hour power reserve and a 43 mm steel case. The Orient Kamasu is the value pick, with sapphire crystal and a Japanese automatic movement at a lower price. The Kamasu's lowest daily price was $252.60 on November 1, 2026; no current price was given for the Tissot, so compare live store prices before deciding.
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Tissot Seastar 1000 Powermatic 80
Choose the Tissot Seastar 1000 if you want 300 m water resistance, a longer 80-hour power reserve and a larger 43 mm case for serious diving or daily wear.
- 300 m water resistance suits real diving.
- 80-hour power reserve keeps it running through a weekend off the wrist.
- Sapphire crystal resists scratches.
- Unidirectional bezel is the safe dive-watch design.
- 43 mm case and 180 g weight feel heavy on smaller wrists.
- 21 mm lug width limits strap choices.
- No price was given, so it may cost more than the Kamasu.
What separates them
| Tissot Seastar 1000 Powermatic 80 | Orient Kamasu Automatic Diver RA-AA0001B | |
|---|---|---|
| Water resistance | 300 m | 200 m |
| Power reserve | Up to 80 hours | 40 hours |
| Case width | 43 mm | 41.8 mm |
| Case thickness | 12.7 mm | Not listed |
| Crystal | Sapphire | Sapphire |
| Movement | Automatic, Powermatic 80 | Automatic Cal. F6922, 22 jewels, 21,600 vph |
| Lug width | 21 mm | 22 mm |
| Weight | 180 g | Not listed |
Price history
- Tissot Seastar 1000 Powermatic 80: lowest $875.00 on Oct 30 at Amazon.
- Orient Kamasu Automatic Diver RA-AA0001B: lowest $252.60 on Nov 1 at Amazon.
Prices at every store
Orient Kamasu Automatic Diver RA-AA0001B
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Specs compared
| Spec | Tissot Seastar 1000 Powermatic 80 | Orient Kamasu Automatic Diver RA-AA0001B |
|---|---|---|
| Water Resistant | 300M | Yes |
| Movement | Automatic | Mechanical |
| Case Material | Steel | Stainless Steel |
| Power Reserve | up to 80 hours | 40 h |
| Lug Width | 21.00 mm | 22 mm |
| Case Width | 43mm | — |
| Bezel | Unidirectional | — |
| Bracelet/Strap | Steel | — |
| Dial Colour | Blue | — |
| Case Thickness | 12.7 | — |
| Crystal |
What reviewers say
Tissot Seastar 1000 Powermatic 80
Owners praise the Seastar 1000 for its value, robust build, and impressive power reserve. Some find the case size and weight substantial for daily wear.
- Excellent value for a Swiss automatic diver
- Long power reserve
- Solid build quality
- Case wears large
- Heavier than some competitors
Orient Kamasu Automatic Diver RA-AA0001B
Owners and reviewers treat the Kamasu as one of the best value automatic divers, praising the sapphire crystal, in-house movement and true 200 m rating at a budget price. Common complaints are the bracelet, the modest power reserve and slightly stiff bezel.
- Sapphire crystal at an entry price
- Accurate, reliable in-house automatic movement
Questions and answers
- Which is better for actual diving?
- The Tissot. Its 300 m rating and unidirectional bezel are built for diving, while the Kamasu's 200 m rating suits swimming and snorkeling.
- Which lasts longer between services?
- Both use proven automatic movements, but the Tissot's 80-hour reserve means less wear from winding and setting. Service intervals depend on use, not the spec sheet.
- Is the Tissot worth the extra money?
- If you dive or want the longer power reserve, yes. If you want sapphire and a Japanese automatic on a budget, the Kamasu covers the basics for less.
- Does the Kamasu have a sapphire crystal?
- Yes. The Kamasu uses sapphire crystal glass, matching the Tissot on scratch resistance.
- Which fits a smaller wrist?
- The Kamasu. Its 41.8 mm case is smaller than the Tissot's 43 mm, and the Tissot weighs 180 g.
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