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Hamilton Khaki Aviation Pilot Pioneer Mechanical Chrono 40mm Unisex Watch
Ref. H76409540
Sits in Hamilton’s upper tier here — more premium than three quarters of the Hamilton watches we list, which start at £375.
Price range £375 to £2,265 across 82 Hamilton watches in stock.The Pioneer sits within Hamilton's long record of supplying military aviators, and its bi-compax layout — 30-minute counter at three, small seconds at nine — follows the functional logic of cockpit instruments rather than the conventions of dress-watch design. The silicon balance spring inside the H-51-Si, built on the Valjoux 7753 platform, makes the movement indifferent to the magnetic fields that troubled older escapements, which matters on a watch whose heritage is genuinely airborne. At 40mm across and 14.35mm deep it wears on the thicker side, and the 47-to-50mm lug span will suit a medium to larger wrist best. The box-shaped sapphire with dual anti-reflective coatings keeps the sunray blue dial readable at oblique angles without flare, and the white-lacquered hands with their Super-LumiNova inserts hold their legibility into low light. The brown leather sits naturally against the brushed case, the polished pump pushers the only dressed element. The solid screwed caseback and 100m rating are considerably more than a pilot chronograph of this character needs to be credible, and the 60-hour power reserve means a weekend off the wrist does not require rewinding on Monday morning.
- Reference
- H76409540
- Brand
- Hamilton
- Collection
- Khaki Aviation
- Case size
- 40mm
- Case thickness
- 14.35mm
- Lug width
- 22mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Blue
- Crystal
- Sapphire
- Movement
- Manual
- Calibre
- H-51-Si
- Functions
- Chronograph, Small seconds
- Water resistance
- 100m
- Bracelet / strap
- Leather strap
- Strap colour
- Brown
- Clasp
- Buckle
- Lume
- Super-LumiNova
- Retailer
- Goldsmiths
Additional specifications
- Lug-to-lug
- 47mm
- Power reserve
- 60 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 Aviation range (8), Back in Stock (3,988), Stainless Steel Watches (2,814), Chronograph Watches (1,087), Leather Strap Watches (928), Blue Dial Watches (778) and Sports Watches (700).
Manufacturer’s guarantee
What the specifications mean
Strengths
- 100m water resistance covers swimming and watersports
- 40mm suits most wrists
- 47mm lug-to-lug keeps the 40mm case wearable
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
Worth knowing
- 14.35mm thick, so it will not disappear under a cuff
- Leather does not suit regular contact with water
Hamilton Khaki Aviation Pilot Pioneer alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | H76409540 | 86011M01 | 724.gb |
|---|---|---|---|
| Price | £1,980 | £1,910 | £1,780 |
| Case size | 40mm | 38mm | 38.5mm |
| Water resistance | 100m | 100m | 100m |
| Movement | Manual | Manual | Manual |
| Strap | Leather strap | Leather strap | Fabric strap |
| Power reserve | 60 hours | 63 hours | 43 hours |
| This watch |
|
|
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 hand-wound, so it needs winding every day or two but never a battery.
Quartz, automatic and solar comparedHow long does it run for when it's not worn?
About 60 hours fully wound — enough to survive a night off the wrist, but not a full weekend.
What size strap does it take?
22mm. 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
Goldsmiths is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.
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