Tissot PRX vs. Hamilton Khaki Field: Which Swiss Automatic Watch Is Right for You?
Choosing between the Tissot PRX Powermatic 80 and the Hamilton Khaki Field Auto is one of the most common questions we get on the sales floor at Lexor Miami — and for good reason. Both watches sit in the same price range, both are Swiss-made automatics with 80-hour power reserves, and both have become modern icons for entirely different reasons: one for its 1970s integrated-bracelet design, the other for its rugged military DNA. In this guide, we break down the design, movement, sizing, and everyday wearability of each watch so you can decide which one belongs on your wrist.
Tissot PRX vs. Hamilton Khaki Field: Two Very Different Icons
The Tissot PRX and the Hamilton Khaki Field Auto rarely show up on the same shortlist, but they should. Both brands are part of the Swatch Group, both are known for delivering genuine Swiss watchmaking under $1,000, and both have built cult followings by doing one thing extremely well instead of trying to do everything. The PRX leans into retro sport-luxury design; the Khaki Field leans into function-first military heritage. Here's how they actually compare.
Design & Case
The Tissot PRX Powermatic 80 is built around its integrated stainless steel bracelet — a tapered, faceted design lifted directly from the original 1978 PRX. The case is slim, the lugs flow seamlessly into the bracelet, and the waffle-textured dial catches light in a way that feels more "dress watch" than "tool watch," even though it's rated to 100m water resistance. It's a watch designed to be worn with a blazer as easily as a t-shirt.
The Hamilton Khaki Field Auto takes the opposite approach. Its 38mm stainless steel case is compact and utilitarian, with a matte black dial, oversized luminous numerals, and a sapphire crystal built for legibility over elegance. It's descended from watches Hamilton actually supplied to the U.S. military, and that heritage shows in every design decision — nothing on this dial exists purely for style.
Movement & Power Reserve
This is where the two watches are surprisingly close. The PRX runs on Tissot's Powermatic 80 caliber, a self-winding movement with an 80-hour power reserve and a Nivachron hairspring for improved shock and magnetic resistance. The Khaki Field Auto runs on Hamilton's H-10 caliber, which also delivers an 80-hour power reserve. Both movements mean you can take the watch off Friday night and it will still be running — and keeping reasonably accurate time — when you pick it up Monday morning.
Sizing & Everyday Wear
The PRX Powermatic 80 wears close to the wrist thanks to its slim case profile, and the integrated bracelet means there's no gap between lug and strap — it sits flush no matter the wrist size. The Khaki Field Auto's 38mm case wears smaller and more classic on the wrist, and its 20mm lug width means the factory bracelet can be swapped for a NATO strap, leather band, or canvas strap in minutes, giving it far more versatility for anyone who likes to rotate straps.
Who Each Watch Is For
If you want one watch that moves effortlessly from the office to dinner and photographs beautifully on Instagram, the PRX wins. If you want a rugged, do-anything watch with genuine military pedigree that can take a hit and keep going, the Khaki Field Auto wins. Neither is the "wrong" choice — they simply serve different parts of a watch collection.
Tissot PRX vs. Hamilton Khaki Field: Quick Comparison
| Spec | Tissot PRX Powermatic 80 | Hamilton Khaki Field Auto |
|---|---|---|
| Reference | T1374071135100 | H70455133 |
| Movement | Powermatic 80, Nivachron hairspring | H-10 automatic |
| Power Reserve | 80 hours | 80 hours |
| Case Material | Stainless steel | Stainless steel |
| Crystal | Sapphire | Sapphire |
| Water Resistance | 100m / 10 bar | 100m / 10 bar |
| Bracelet/Strap | Integrated steel bracelet | Steel bracelet, 20mm lug width |
| Design Style | Retro sport-luxury / '70s revival | Military field watch |
| Price | $850.00 | $845.00 |
Shop the Watches
Tissot PRX Powermatic 80
$850.00
Reference T1374071135100. Integrated stainless steel bracelet, self-winding Powermatic 80 movement with 80-hour power reserve, Nivachron hairspring, and 100m water resistance. The definitive retro-modern everyday watch.
Shop Tissot PRX
Hamilton Khaki Field Auto
$845.00
Reference H70455133. 38mm stainless steel case, automatic H-10 caliber with 80-hour power reserve, sapphire crystal, and 100m water resistance. Military-grade durability with everyday wearability.
Shop Hamilton Khaki FieldStill Deciding? Visit Lexor Miami
Photos and spec sheets only tell you so much. The best way to choose between the PRX and the Khaki Field Auto is to try both on — feel the weight, see how the bracelet or strap sits on your wrist, and compare the dials side by side under real light. Our team at Lexor Miami's Miami showroom works with both collections daily and can help you find the exact reference, dial color, and strap combination that fits your style and budget.
Final Thoughts
Both the Tissot PRX Powermatic 80 and the Hamilton Khaki Field Auto deliver genuine Swiss automatic movements, 80-hour power reserves, and authorized-dealer peace of mind for under $900. The decision ultimately comes down to which world you want your watch to live in:
- Tissot PRX Powermatic 80 (T1374071135100) — $850.00. Best for retro sport-luxury style, integrated-bracelet design, and dress-to-casual versatility.
- Hamilton Khaki Field Auto (H70455133) — $845.00. Best for military heritage, strap versatility, and rugged everyday durability.
Whichever you choose, both watches are available now at Lexor Miami, an authorized dealer for Tissot and Hamilton, with fast U.S. shipping and manufacturer warranty included.
Frequently Asked Questions
Is the Tissot PRX or Hamilton Khaki Field a better everyday watch?
Both are excellent daily watches. The PRX's slim integrated bracelet makes it comfortable under a shirt cuff and versatile for dressier occasions, while the Khaki Field's compact 38mm case and swappable 20mm strap make it easier to adapt to gym days, travel, or outdoor activity.
How long does the power reserve last on each watch?
Both watches offer an 80-hour power reserve — the Tissot PRX via its Powermatic 80 caliber and the Hamilton Khaki Field Auto via its H-10 caliber. That means either watch can sit unworn for a full weekend and still be running when you pick it up again.
Are the Tissot PRX and Hamilton Khaki Field water resistant?
Yes. Both models are rated to 100 meters (10 bar) of water resistance, which is suitable for swimming and daily wear, though neither is designed as a dedicated dive watch.
Can I swap the strap on the Hamilton Khaki Field Auto?
Yes. The Khaki Field Auto has a standard 20mm lug width, making it easy to switch between the factory steel bracelet, NATO straps, leather bands, or canvas straps.
Can I swap the bracelet on the Tissot PRX?
The PRX bracelet is integrated into the case design, so swapping it isn't as simple as a standard strap change and generally requires the specific PRX bracelet or strap made for that case shape.
Does Lexor Miami sell authentic Tissot and Hamilton watches?
Yes. Lexor Miami is an authorized dealer for both Tissot and Hamilton. Every watch we sell is 100% authentic, brand new, and covered by the manufacturer's warranty.
