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Hamilton Khaki Field Auto 38mm Unisex Watch Blue
Ref. H70455140
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Stepping up in the same colour and case shape
The Khaki Field's story begins in the Second World War, when Hamilton supplied precision instruments to Allied forces — a history the Field line has carried forward ever since. The H70455140 sits at 38mm, a diameter that reads as considered rather than cautious: close enough to the original soldiers' watches to feel honest about where it comes from, and proportioned well enough to sit equally on narrower wrists. The navy sunray dial with its snailed hour ring does something worth noting: the two textures catch light at different angles, so the dial shifts between flat and layered depending on how the wrist turns. The H-10 movement inside is Hamilton's own calibre, built on a proven base but specified to an 80-hour power reserve — enough to leave it on the nightstand from Friday to Monday and find it still running. The Nivachron balance spring resists magnetic fields that would upset a conventional lever-set movement, which matters more now than it did in 1940 given how many magnetised surfaces a watch passes near in a day. The display caseback makes that movement visible, and it is worth a look.
- Reference
- H70455140
- Brand
- Hamilton
- Collection
- Khaki Field
- Case size
- 38mm
- Case thickness
- 11.5mm
- Lug width
- 20mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Blue
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- H-10
- Functions
- Date
- Water resistance
- 100m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Deployant clasp
- Lume
- Super-LumiNova
- Retailer
- Mappin & Webb
Additional specifications
- Lug-to-lug
- 47mm
- Power reserve
- 80 hours
Learn more about Hamilton
Hamilton was founded in Lancaster, Pennsylvania in 1892, and its early business was the railroad. American rail accidents caused by unsynchronised timekeeping had forced the industry to adopt strict standards, and Hamilton built pocket watches accurate enough to meet them — earning the description the watch of railroad accuracy.
Two things then defined it. The first was war: Hamilton supplied over a million watches to American forces in the Second World War, suspending civilian production entirely, and its marine chronometers were fitted across the US Navy.
The second was electricity. The Ventura of 1957 was the first battery-powered electric wristwatch, and its asymmetric shield-shaped case, designed by Richard Arbib, looked like nothing before it. Elvis Presley wore one in Blue Hawaii.
Hamilton's cinematic presence is unusually deep — over five hundred films — and includes the watches designed for 2001: A Space Odyssey with Stanley Kubrick, and appearances in Interstellar and Tenet.
American manufacturing ended in 1969 as the quartz crisis approached. The brand was acquired by the Swiss and is now part of the Swatch Group, based in Biel, where it occupies a distinctive position: American design heritage, Swiss production, and ETA movements with long power reserves at accessible prices. The Khaki Field, descended from the wartime issue watches, is its best-known line.
- 1892
- Founded in Lancaster, Pennsylvania.
- 1918
- Supplies the first US airmail flights.
- 1957
- The Ventura is the first electric wristwatch.
- 1968
- Designs the watches for 2001: A Space Odyssey.
- 1974
- Becomes Swiss-owned; now part of the Swatch Group.
Also in 7 collections
This watch appears in the Hamilton Khaki Field range (50), Back in Stock (3,988), Stainless Steel Watches (2,814), Automatic Watches (1,546), Blue Dial Watches (778), Sports Watches (700) and Field Watches (53).
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What the specifications mean
A mechanical watch for everyday wear.
Strengths
- 100m water resistance covers swimming and watersports
- 38mm suits most wrists
- Sapphire crystal, which resists scratching
- 80-hour reserve survives a weekend off the wrist
- Luminous hands and markers for low light
Hamilton Khaki Field Auto alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | H70455140 | T1658071105100 | 68000Q77 |
|---|---|---|---|
| Price | £715 | £690 | £685 |
| Case size | 38mm | 38mm | 38mm |
| Water resistance | 100m | 100m | 100m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Stainless steel bracelet | Stainless steel bracelet | Stainless steel bracelet |
| Power reserve | 80 hours | 80 hours | — |
| This watch | Closely matched | Closely matched |
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 100m it is rated for swimming and snorkelling, though not for diving.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
Quartz, automatic and solar comparedHow long does it run for when it's not worn?
About 80 hours fully wound — enough to sit off the wrist over a weekend and still be running.
What size strap does it take?
20mm. Any strap of that width will fit, and on most modern watches quick-release bars make the swap a two-minute job with no tools.
Will it fit my wrist?
Lug-to-lug is 47mm, which suits wrists from roughly 16cm (6¼ inches) upward.
Lug-to-lug decides fit more than case diameter does.
How to size a watch to your wristIs it a men's or women's watch?
Listed as unisex, and at this size it suits any wrist that takes the dimensions.
Cheapest place to buy
Both Mappin & Webb and Goldsmiths list it at £715, so choose on delivery and warranty rather than price.
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