Hamilton Khaki Field King Auto 40 H64455133
The Khaki Field King: 40 mm automatic with day and date on a steel bracelet, H-40 caliber with 80-hour reserve, sapphire, 50 m. Black dial.
In stock · sold by Amazon.com. Price as of November 3, 2026, 18:15 UTC.
What you get
Published manufacturer specifications. Fields we could not verify are left out rather than guessed.
How the 76 spec points add up
Value Score = 100 × √(spec points per dollar ÷ the best ratio among mechanical field watches in stock on Amazon today). Full methodology.
Compared with other mechanical field watches
Same type, other model families, verified Amazon prices today. See the full Mechanical Field Watches ranking →
| # | Watch | Movement | Crystal | Water res. | Case diameter × lug-to-lug | Fits wrist | Spec pts | Price | Value Score | Buy |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Automatic (Miyota 821D) | Mineral | 30 m | 38 mm | — | 53 | $367.50 | 100 | Amazon | |
| 2 | Automatic (H-40) | Sapphire | 50 m | 40 mm | — | 76 | $845.00 | 79 | Amazon |
Amazon.com prices as of November 3, 2026, 18:15 UTC — details. third-party = sold by a marketplace seller, not Amazon (warranty may differ); ships later = not in stock today, never crowned best value.
Questions about the Hamilton Khaki Field King Auto 40 H64455133
How much does the Hamilton Khaki Field King Auto 40 H64455133 cost on Amazon?
What is the Value Score of the Hamilton Khaki Field King Auto 40 H64455133?
What wrist size fits the Hamilton Khaki Field King Auto 40 H64455133?
What are alternatives to the Hamilton Khaki Field King Auto 40 H64455133?
20 mm straps that fit the Hamilton Khaki Field King Auto 40 H64455133
The lug width is 20 mm, so any 20 mm strap fits. These are the straps we list for that width; see the lug width chart for every size and the accessories page for winders, boxes and tools. Full picks with buying notes: Best 20 mm watch straps.
| Item | Kind | Lug width | Price | Buy |
|---|---|---|---|---|
 BISONSTRAP hand-stitched leather, quick release, 20 mm Entry-price leather with quick-release pins. | Leather strap | 20 mm | $14.99third-party | Amazon |
 Getalia Tuscany vegetable-tanned leather, 20 mm Full-grain Italian leather; ages with wear. | Leather strap | 20 mm | $24.99third-party | Amazon |
 Archer military-style nylon, 20 mm, black Heavy nylon with brushed hardware. | Nylon / NATO strap | 20 mm | $19.99third-party | Amazon |
 Archer military-style nylon, 20 mm, black/gray Heavy nylon with brushed hardware. | Nylon / NATO strap | 20 mm | $19.99third-party | Amazon |
 StrapHabit FKM rubber, quick release, 20 mm Fluororubber: no smell, no sweat marks; the diver upgrade. | Rubber strap | 20 mm | $38.95third-party | Amazon |
 WOCCI 316L steel bracelet, double-locking clasp, 20 mm Inexpensive solid steel bracelet. | Steel bracelet | 20 mm | $28.99third-party | Amazon |
 EACHE steel mesh bracelet, 20 mm Milanese mesh for dress and field watches. | Steel bracelet | 20 mm | $19.99third-party | Amazon |
Amazon.com prices as of November 3, 2026, 18:15 UTC — details. Accessories have no Value Score; they are listed for fit, not ranked.
Guides that apply to this watch
- Ranked among watches under $1,000
- What the water-resistance rating actually permits
- Sapphire vs Hardlex vs mineral: what the crystal changes
- Lug width and strap sizing
- Automatic vs solar vs quartz: accuracy and running cost
- Watch gift guide by budget and recipient
- Buying a watch on Amazon: sellers, warranty, returns