Tissot PRX vs Hamilton Khaki Field
Integrated bracelet sophistication meets military heritage
Quick Verdict
The Tissot PRX ($500–$1,000) is the better choice for office-to-evening versatility with its sleek integrated bracelet, while the Hamilton Khaki Field — a little cheaper within the same band — excels as a rugged everyday tool watch with proven military DNA. Both share 80-hour power reserves and sapphire crystals.
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Specifications Compared
| Feature | Tissot PRX Powermatic 80 | Hamilton Khaki Field Automatic |
|---|---|---|
| Price | $500–$1,000 | $500–$1,000 |
| Case Size | 40mm | 38mm |
| Movement | Automatic Powermatic 80.111 | Automatic H-10 |
| Caliber Type | In-House Automatic (ETA C07.111 base) | Automatic (ETA C07.611 base) |
| Power Reserve | 80 Hours | 80 Hours |
| Water Resistance | 100m (10 ATM) | 100m (10 ATM) |
| Crystal | Scratch-resistant Sapphire | Sapphire Crystal |
| Case Material | 316L Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Completely different design languages — both excellent
The PRX channels 1970s integrated-bracelet luxury à la Royal Oak, with a waffle-textured dial and clean indices. The Khaki Field is pure military utility — Arabic/baton numerals, high-contrast dial, and a versatile case that accepts any 20mm strap. Neither is "better" — they serve different moods.
Movement & Performance
Near-identical specs — both Swatch Group powerhouses
The PRX runs the Powermatic 80 (based on ETA C07.111) and the Khaki uses the H-10 (based on ETA 2824). Both deliver 80-hour power reserves, hack and handwind, and run at 21,600 vph. Real-world accuracy is typically ±5-10 sec/day for both. Functionally, it's a tie.
Wearability & Fit
Khaki Field is more versatile for different wrist sizes
The PRX at 40mm with 47.4mm lug-to-lug wears larger than its spec suggests due to the integrated bracelet. The Khaki Field comes in both 38mm and 42mm options with ~47mm lug-to-lug, making it easier to match to your wrist. The Khaki also accepts any standard 20mm strap, while the PRX is limited to proprietary bracelet replacements.
Value & Cost of Ownership
Hamilton wins on price — noticeably cheaper with comparable specs
Both sit in the $500–$1,000 band, but the Khaki Field lands meaningfully lower within it while offering essentially the same movement technology. Both require similar service intervals (5-7 years, ~$250-350). The Khaki Field also has a stronger aftermarket strap ecosystem, so you can refresh the look for $20-40 instead of buying expensive proprietary bracelets.
Brand Heritage
Different legacies — both deeply authentic
Tissot (est. 1853) is the official timekeeper of the NBA, MotoGP, and Tour de France, representing accessible Swiss precision. Hamilton (est. 1892) supplied watches to the U.S. military in both World Wars and has appeared in 500+ Hollywood films. Both are Swatch Group brands with exceptional after-sales support.
Materials Face-Off
| Component | Tissot PRX Powermatic 80 | Hamilton Khaki Field Automatic |
|---|---|---|
| Case alloy | Stainless steel 316L (medical-grade, with composition Cr 16–18%, Ni 10–14%, Mo 2–3%) — the standard mid-range Swiss spec; not 904L (Rolex Oystersteel | Stainless steel, brushed finish. Hamilton does not publish the alloy grade for this reference. |
| Sapphire crystal | Synthetic corundum (Al₂O₃) grown via the Verneuil process, Mohs hardness 9. Anti-reflective coating on the interior surface only (single-side AR is st Mohs 9 | Verneuil-grown sapphire, single-side AR coating. |
| Lume specification | Super-LumiNova on the hands and markers. Grade and glow duration are not published by the manufacturer for this reference, so neither is claimed here. | Super-LumiNova on the hands and hour numerals. Hamilton lists "Super Luminova: Yes" for this reference and does not publish a grade, so none is claimed here. |
| Bracelet alloy | Stainless steel 316L matching the case. | Full-grain leather (varies by reference). |
Cost of Ownership Compared
The Hamilton Khaki Field Automatic saves you $161 over 5 years of ownership
Who Should Pick Which
Pick the Tissot PRX Powermatic 80 if…
- Strong value proposition under $1,000 with automatic Swiss movement
- Active lifestyle wearers — 100m water resistance handles swimming and water sports
- Weekend warriors — 80-hour power reserve means it survives two days off the wrist
- Those who prioritize scratch resistance — sapphire crystal
- Integrated-bracelet aesthetic fans wanting the Royal Oak look for 1/20th the price
Pick the Hamilton Khaki Field Automatic if…
- Strong value proposition under $1,000 with quality construction
- Active lifestyle wearers — 100m water resistance handles swimming and water sports
- Weekend warriors — 80-hour power reserve means it survives two days off the wrist
- Those who prioritize scratch resistance — sapphire crystal
- Military/field watch enthusiasts who value legibility and durability
Tissot PRX Powermatic 80
- Retail markup is generous. The PRX commonly transacts at 30–40% under retail on Jomashop, Tissot's own e-commerce promotions, and authorized online dealers. Paying full $725 retail is rarely the right move — it usually means immediate ~30% loss the moment you walk out the door.
- Proprietary endlink limits strap options. The integrated bracelet design means you cannot easily put a NATO, leather two-piece, or rubber strap on the PRX without specialist hardware. This bothers some buyers more than they expect.
- Bracelet sizing is fiddly. Links are joined by screws (good — adjustable at home with a tool), but the screws are tiny and stripping them is common for inexperienced owners. Take it to a watchmaker for sizing if you're unsure.
- 3 Hz "slow" seconds. The reduced frequency (21,600 vph vs. 28,800 vph in some peer movements) means the seconds hand visibly sweeps at 6 ticks/second rather than 8. Some buyers expecting the smoother high-beat sweep find this a minor disappointment.
Hamilton Khaki Field Automatic
- Same H-10 / C07 movement as Tissot PRX and Mido — paying brand premium for the Hamilton heritage
- 3 Hz "slow" seconds beat (visible 6 ticks/sec vs. 8)
- Strap quality is adequate, not exceptional
- No hacking, but movement is auto-only (no hand-wind on the 80h variant — older H-30 caliber refs had it)
Our Verdict
Tissot
PRX Powermatic 80
Choose the Tissot PRX if you want a versatile watch that transitions from boardroom to bar. The integrated bracelet gives it a dressier, more modern presence that pairs with everything from suits to jeans.
Check Price on AmazonHamilton
Khaki Field Automatic
Choose the Hamilton Khaki Field if you want a rugged, legible tool watch with genuine military heritage. It's the cheaper of the two, supremely readable, and looks equally at home on a NATO strap during a hike or a leather strap at dinner.
Check Price on AmazonThe Bottom Line
The Tissot PRX Powermatic 80 offers integrated-bracelet sophistication in the $500–$1,000 band, while the Hamilton Khaki Field Automatic delivers military heritage and field-watch durability for somewhat less — both feature 80-hour power reserves from the same Swatch Group movement family.
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How This Page Was Made
Our comparisons are generated from a hand-maintained specification database and reviewed under our editorial standards. We use AI tools to assemble pages from that data. We don’t invent specs: every number traces back to the database, and when we correct an entry, the fix is applied site-wide. As an Amazon Associate, The Horologist earns from qualifying purchases.