Tissot PRX Powermatic 80 vs Hamilton Khaki Field Auto
Tissot PRX T1374071104100 vs Hamilton Khaki Field Auto H70455533, compared on the specs each brand publishes.
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The short answer
Two Swatch Group automatics under about $1,000 that often top first-watch shortlists.
- Case size: the Tissot PRX T1374071104100 is 2 mm larger (40 mm vs 38 mm).
- Thickness: the Hamilton Khaki Field Auto H70455533 is 0.07 mm thicker (11 mm vs 10.93 mm).
- Price: the Hamilton Khaki Field Auto H70455533 lists for $55 less in the US ($795 vs $850).
- Lug width: Tissot PRX T1374071104100 has 12 mm; Hamilton Khaki Field Auto H70455533 has 20 mm.
- Features: only the Tissot PRX T1374071104100 has a date.
Side-by-side specs
| Spec | Tissot PRX T1374071104100 | Hamilton Khaki Field Auto H70455533 |
|---|---|---|
| Case diameter | 40 mm | 38 mm |
| Thickness | 10.93 mm | 11 mm |
| Lug width | 12 mm | 20 mm |
| Calibre | Not stated | H-10 |
| Movement | Automatic | Automatic |
| Power reserve | 80 h | 80 h |
| Water resistance | 100 m | 100 m |
| Crystal | Sapphire | Sapphire |
| Case material | Stainless steel | Stainless steel |
| Ships on | Bracelet | Leather strap |
| Weight | 138 g | Not published by Hamilton |
| US list price | $850 (US list) | $795 (US list) |
| Dial | Blue | Black |
| Status | In production | In production |
| Suits wrists of about our sizing guide | 16.0–17.9 cm | 15.1–17.0 cm |
Specs summarised in our own words from the brand's product pages: T1374071104100 source (checked 3 Nov 2026) H70455533 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.
- Tissot PRX T1374071104100 –
- Hamilton Khaki Field Auto H70455533 –
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
The Tissot PRX T1374071104100 has 12 mm lugs. The Hamilton Khaki Field Auto H70455533 has 20 mm lugs. A strap bought for one won't fit the other. Size charts: Tissot lug width chart · Hamilton lug width chart.
Which should you buy?
It is the more compact case on paper (38 mm across). Our sizing guide puts it at about 15.1–17.0 cm.
It has the lower US list price, $795, a $55 difference.
Prices and where to buy
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More: All Tissot PRX references · All Hamilton Khaki Field references.
Questions
Which is bigger, the Tissot PRX T1374071104100 or the Hamilton Khaki Field Auto H70455533?
Per the brands, the Tissot PRX T1374071104100 is 40 mm across and the Hamilton Khaki Field Auto H70455533 is 38 mm.
Which is cheaper?
The Hamilton Khaki Field Auto H70455533, at a US list price of $795 vs $850 when we checked.
Which is more water-resistant?
Tissot PRX T1374071104100: 100 m. Hamilton Khaki Field Auto H70455533: 100 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.