The Hamilton Khaki Field Auto H70455533 is a 38 mm automatic field watch with an 80-hour typical power reserve, sapphire crystal and 10 bar (100 m) water resistance, according to Hamilton. Its published 47 mm lug-to-lug length and 20 mm lug width are useful when assessing fit and strap options. The specifications below apply to this exact reference; they are manufacturer claims, not independent test results.
Hamilton Khaki Field Auto H70455533 specifications
Hamilton’s US product page identifies H70455533 as a 38 mm automatic watch in the Khaki Field collection. These are the specifications Hamilton publishes for that reference:
| Specification | Hamilton’s published detail |
|---|---|
| Reference and collection | H70455533, Khaki Field Auto |
| Movement | Automatic H-10 caliber |
| Typical power reserve | 80 hours |
| Case diameter | 38 mm |
| Case thickness | 11 mm |
| Lug-to-lug | 47 mm |
| Lug width | 20 mm |
| Case and dial | Stainless-steel case; black dial |
| Crystal | Sapphire |
| Water resistance | 10 bar (100 m) |
| Other features | Open case back, Nivachron balance spring and Super-LumiNova |
| Supplied strap | Cow leather, reference H6007041041, with pin buckle |
Hamilton describes the 80-hour figure as a typical power reserve for its H-10 caliber. It is the manufacturer’s stated specification, not a runtime measurement from an independent test. Hamilton’s product copy says, “With 80 hours of typical power reserve in the exclusive H-10 automatic caliber, the Khaki Field Auto will keep you going.” Hamilton’s official US product page is the source for the reference-specific details.
What the dimensions tell you about fit
The 38 mm figure is the case diameter; it does not describe the full distance the watch spans across the wrist. Hamilton also lists 47 mm lug-to-lug, the measurement from one end of the lugs to the other. Consider both dimensions when comparing the watch with one you already wear. Neither measurement alone establishes how it will fit an individual wrist.
#1 Best Overall
- AUTOMATIC MOVEMENT: Swiss H-10 movement with 80-hour reserve ensures consistent performance. Experience precision that matches both daily tasks and adventures, a testament to Swiss craftsmanship in automatic timekeeping.
- WATER RESISTANT TO 100M: Withstands 10 bar (100 meters), ideal for swimming and outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- BUILT FOR ADVENTURE: Featuring a 42mm stainless steel case, a black dial and leather strap, this watch combines durability and functionality. With Super-LumiNova and sapphire crystal, it’s ready to tackle your outdoor challenges.
- PREMIUM MATERIALS: Leather strap with pin buckle offers day-long comfort. The clean lines and sophisticated design make it the perfect accessory for both casual wear and formal attire, merging functionality with fashion.
- RICH HERITAGE: Over a century of Hamilton's legacy in field watches, admired for precision. Originally designed for WWI soldiers, these timepieces combine rugged durability with history, showcasing Hamilton's commitment to quality and innovation.
The published 20 mm lug width gives you a concrete starting point if you want to replace the included leather strap. Look for a strap sized for 20 mm lugs, and confirm the replacement’s end shape and attachment method before ordering. A NATO-style strap is one possible style choice, but Hamilton’s specification does not verify compatibility for any particular third-party strap.
Choosing between the 38 mm and 42 mm versions
Hamilton says the Khaki Field Auto collection is available in 38 mm and 42 mm sizes. The detailed specifications cited here are for the 38 mm H70455533. The available information does not establish a full comparison of the 42 mm model’s dimensions or how either size wears on different wrists, so diameter alone is not enough to make a universal fit recommendation. Compare the exact reference’s measurements and, if possible, try it on before deciding.
Rank #2
- AUTOMATIC MOVEMENT: Swiss H-10 movement with 80-hour reserve ensures consistent performance. Experience precision that matches both daily tasks and adventures, a testament to Swiss craftsmanship in automatic timekeeping.
- WATER RESISTANT TO 100M: Withstands 10 bar (100 meters), ideal for swimming and outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- BUILT FOR ADVENTURE: Featuring a 38mm stainless steel case, a black dial and leather strap, this watch combines durability and functionality. With Super-LumiNova and sapphire crystal, it’s ready to tackle your outdoor challenges.
- PREMIUM MATERIALS: Leather strap with pin buckle offers day-long comfort. The clean lines and sophisticated design make it the perfect accessory for both casual wear and formal attire, merging functionality with fashion.
- RICH HERITAGE: Over a century of Hamilton's legacy in field watches, admired for precision. Originally designed for WWI soldiers, these timepieces combine rugged durability with history, showcasing Hamilton's commitment to quality and innovation.
Price and page details can change
When Hamilton’s US page was observed in 2026, it listed H70455533 at $795 and showed it in stock, with 60 reviews and a 4.7/5 overall rating. Those are changeable observations from a US product page, not permanent specifications or a dated market survey. Check the current listing for price, availability and review details before buying.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What is and is not established
The manufacturer’s page supplies model specifications, but the information available here does not include an independent accuracy measurement, movement test, long-term durability assessment or hands-on comparison of the two case sizes. Treat the power reserve and other technical details as Hamilton’s published claims rather than independently verified performance. For a purchase, confirm that the listing names reference H70455533, particularly if you are comparing it with another Khaki Field Auto size or a different strap configuration.
Quick Recap
Best Value
- AUTOMATIC MOVEMENT: Swiss H-40 movement with 80-hour reserve ensures consistent performance. Experience precision that matches both daily tasks and adventures, a testament to Swiss craftsmanship in automatic timekeeping.
- WATER RESISTANT TO 50M: Withstands 5 bar (50 meters), ideal for swimming and outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- BUILT FOR ADVENTURE: Featuring a 40mm stainless steel case, a black dial and leather strap, this watch combines durability and functionality. With Super-LumiNova and sapphire crystal, it’s ready to tackle your outdoor challenges.
- PREMIUM MATERIALS: Leather strap with pin buckle offers day-long comfort. The clean lines and sophisticated design make it the perfect accessory for both casual wear and formal attire, merging functionality with fashion.
- RICH HERITAGE: Over a century of Hamilton's legacy in field watches, admired for precision. Originally designed for WWI soldiers, these timepieces combine rugged durability with history, showcasing Hamilton's commitment to quality and innovation.
Rank #4
- AUTOMATIC MOVEMENT: Swiss H-10 movement with 80-hour reserve ensures consistent performance. Experience precision that matches both daily tasks and adventures, a testament to Swiss craftsmanship in automatic timekeeping.
- WATER RESISTANT TO 100M: Withstands 10 bar (100 meters), ideal for swimming and outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- BUILT FOR ADVENTURE: Featuring a 42mm stainless steel case, a black dial and leather strap, this watch combines durability and functionality. With Super-LumiNova and sapphire crystal, it’s ready to tackle your outdoor challenges.
- PREMIUM MATERIALS: Leather strap with pin buckle offers day-long comfort. The clean lines and sophisticated design make it the perfect accessory for both casual wear and formal attire, merging functionality with fashion.
- RICH HERITAGE: Over a century of Hamilton's legacy in field watches, admired for precision. Originally designed for WWI soldiers, these timepieces combine rugged durability with history, showcasing Hamilton's commitment to quality and innovation.
Rank #3
- AUTOMATIC MOVEMENT: Swiss H-10 movement with 80-hour reserve ensures consistent performance. Experience precision that matches both daily tasks and adventures, a testament to Swiss craftsmanship in automatic timekeeping.
- WATER RESISTANT TO 100M: Withstands 10 bar (100 meters), ideal for swimming and outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- BUILT FOR ADVENTURE: Featuring a 42mm stainless steel case, a black dial and stainless steel bracelet, this watch combines durability and functionality. With Super-LumiNova and sapphire crystal, it’s ready to tackle your outdoor challenges.
- PREMIUM MATERIALS: Stainless steel bracelet with folding clasp offers day-long comfort. The clean lines and sophisticated design make it the perfect accessory for both casual wear and formal attire, merging functionality with fashion.
- RICH HERITAGE: Over a century of Hamilton's legacy in field watches, admired for precision. Originally designed for WWI soldiers, these timepieces combine rugged durability with history, showcasing Hamilton's commitment to quality and innovation.
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