Hamilton Khaki Navy Scuba vs Tissot Seastar 1000
Hamilton Khaki Navy Scuba Auto H82315131 vs Tissot Seastar 1000 T1208071105100, compared on the specs each brand publishes.
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The short answer
Two Swatch Group automatic divers at similar prices, compared on published specs.
- Thickness: the Hamilton Khaki Navy Scuba Auto H82315131 is 0.47 mm thicker (12.95 mm vs 12.48 mm).
- Water resistance: the Tissot Seastar 1000 T1208071105100 is 200 m more (300 m vs 100 m).
- Price: the Tissot Seastar 1000 T1208071105100 lists for $100 less in the US ($875 vs $975).
- Features: only the Tissot Seastar 1000 T1208071105100 has a date.
Side-by-side specs
| Spec | Hamilton Khaki Navy Scuba Auto H82315131 | Tissot Seastar 1000 T1208071105100 |
|---|---|---|
| Case diameter | 40 mm | 40 mm |
| Thickness | 12.95 mm | 12.48 mm |
| Lug width | 20 mm | 20 mm |
| Calibre | H-10 | Not stated |
| Movement | Automatic | Automatic |
| Power reserve | 80 h | 80 h |
| Water resistance | 100 m | 300 m |
| Crystal | Sapphire | Sapphire |
| Case material | Stainless steel | Stainless steel |
| Ships on | Bracelet | Bracelet |
| Weight | Not published by Hamilton | 148 g |
| US list price | $975 (US list) | $875 (US list) |
| Dial | Black | Black |
| Status | In production | In production |
| Suits wrists of about our sizing guide | 16.0–17.9 cm | 16.0–17.9 cm |
Specs summarised in our own words from the brand's product pages: H82315131 source (checked 3 Nov 2026) T1208071105100 source (checked 3 Nov 2026). "Not published" means the brand page we checked doesn't list it, so we leave it blank rather than guess.
Wrist fit
Lug-to-lug decides overhang more than diameter does. Enter your wrist to see how each one should wear.
- Hamilton Khaki Navy Scuba Auto H82315131 –
- Tissot Seastar 1000 T1208071105100 –
Same rule of thumb as Watch Finder: case diameter of about 23.5% of your wrist circumference (−2 mm to +2.5 mm), and lug-to-lug no longer than about 29% of it plus 1 mm. A guide, not a rule; flat or round wrists differ.
Strap fit
Both take 20 mm straps, so straps move between them. Size charts: Hamilton lug width chart · Tissot lug width chart.
Which should you buy?
It has the lower US list price, $875, a $100 difference.
It has the higher water-resistance rating: 300 m vs 100 m.
Prices and where to buy
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More: All Hamilton Khaki Navy references · All Tissot Seastar references.
Questions
Which is bigger, the Hamilton Khaki Navy Scuba Auto H82315131 or the Tissot Seastar 1000 T1208071105100?
Per the brands, the Hamilton Khaki Navy Scuba Auto H82315131 is 40 mm across and the Tissot Seastar 1000 T1208071105100 is 40 mm.
Which is cheaper?
The Tissot Seastar 1000 T1208071105100, at a US list price of $875 vs $975 when we checked.
Which is more water-resistant?
Hamilton Khaki Navy Scuba Auto H82315131: 100 m. Tissot Seastar 1000 T1208071105100: 300 m.
Have you tested these watches?
No. This comparison uses brand-published specs and our own analysis of them, not hands-on testing.
Watch.co is independent and not affiliated with any brand. We haven't handled these watches for this page: everything here comes from brand-published specs and our own analysis. Brand names are used only to identify products.