Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minutePC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11The Hamilton Khaki Field King Auto H64455533 pairs a 40 mm stainless-steel case with an automatic H-40 movement, an 80-hour stated power reserve, and a day-and-date display. Hamilton lists it in the current Khaki Field collection. The specifications below are the manufacturer’s; they are not independent measurements or wear-test results.
Which Khaki Field King is this?
This article covers reference H64455533, which Hamilton names the Khaki Field King Auto. That reference matters: other watches called Khaki Field King may have different specifications. Hamilton’s US product listing identifies this exact model and publishes its current specifications.
The name “hands-on” should not be mistaken for a report of personal ownership or testing. No wrist-fit, accuracy, lume, or water-resistance test is established here. Fratello’s hands-on article offers design and enthusiast context, but it concerns reference H64465733, so its measurements should not be applied to H64455533.
What are the published specifications?
| Feature | Hamilton’s published specification |
|---|---|
| Reference and collection | H64455533, Khaki Field King Auto |
| Movement | H-40 automatic |
| Functions | Day and date |
| Power reserve | 80 hours |
| Case diameter | 40 mm |
| Case thickness | 11.15 mm |
| Lug-to-lug length | Not stated on the Hamilton US product page |
| Case and dial | Stainless steel case; black dial; luminous material |
| Crystal | Sapphire |
| Water resistance | 5 bar (50 m) |
| Case back | Open |
| Listed strap | Cow leather, reference H6007041041; 20 mm lug width; pin buckle; 18 mm buckle width |
These are specifications published by Hamilton for H64455533, not independent measurements. Sapphire is the stated crystal material; that alone does not mean it is scratch-proof. The 5 bar (50 m) rating is a published water-resistance figure, not a promise of suitability for diving or any particular water sport.
Free tools Windows power users keep installed
One-click scans. No signup required.
#1 Best Overall
- 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.
What does the H-40 and its 80-hour reserve mean in daily use?
The H-40 is an automatic movement: movement of the wrist turns an internal rotor, which winds the mainspring. Hamilton describes it this way: “Wrist movements cause the inner rotor to swing, transferring energy to the mainspring, and powering your timepiece.” The movement also supports manual winding, according to Hamilton’s general automatic or manual instruction page.
Hamilton states an 80-hour power reserve and says it can allow the watch to keep running from Friday until Monday after removal. Treat that as the maker’s stated reserve, not a guarantee that every watch will run for exactly that long in every condition. If it stops, Hamilton’s general instructions for automatic watches describe crown positions for winding, setting the day and date, and setting the time. They list H-40 among the supported calibers; they do not establish a model-specific restricted setting interval.
Rank #2
- 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 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.
How does the day-date layout shape the design?
Alongside the time, the dial shows both the weekday and date. That makes the watch more informative at a glance than a date-only or no-date layout, but it also gives the day-date display a prominent place on the dial. Whether that arrangement suits you is a matter of preference; inspect the exact reference’s dial images or see it in person if the display’s position is important to you.
Hamilton highlights military time on the dial and crown protectors as elements of the Khaki Field styling. The open case back exposes a view of the movement, while Super-LumiNova is the listed luminous material. Those are manufacturer-stated features, not a measure of how bright the lume appears or how long it remains visible after charging.
Recommended Free Tools
Rank #3
- 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.
What do the case dimensions and water rating tell you?
The published case diameter is 40 mm and thickness is 11.15 mm. Hamilton’s US product page does not state a lug-to-lug measurement, so diameter and thickness alone cannot establish how the watch will span your wrist. Wrist shape, strap choice, and personal preference also affect fit; the most reliable check is trying on this reference or comparing its dimensions with a watch you already wear.
The 5 bar (50 m) rating is the limit of what the cited listing establishes. It should not be read as a diving specification or as proof of suitability for a particular activity in water. Follow Hamilton’s guidance for use and care rather than treating the printed depth figure as a guarantee for a real-world scenario.
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 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.
Which strap fits, and what should buyers verify?
Hamilton lists cow leather strap H6007041041 with a 20 mm lug width, pin buckle, and 18 mm buckle width. The listed lug width is a useful starting point when considering another strap, but width alone does not establish fit or compatibility with every strap design. Verify the exact strap dimensions and attachment before ordering a substitute.
Price and inventory are regional and can change. At the time represented by Hamilton’s current product listing, the US page showed $795 and in-stock status, while the Ireland page showed €745 and in-stock status. Check the relevant US page or Ireland page for current local pricing and availability; neither figure is a universal price.
Best Value
- 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.
Who should consider the Khaki Field King Auto?
H64455533 is worth considering if you want an automatic field-style watch with both weekday and date displays, a stated 80-hour reserve, and a 40 mm case. Its most consequential trade-offs are personal: whether you like the day-date layout, whether the stated dimensions suit your wrist, and whether the 5 bar rating fits your intended use. The published specifications alone do not establish that it is the best choice or a better value than a particular competing watch.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
