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Hamilton Khaki Aviation Pilot Pioneer Mechanical Chrono 40mm Unisex Watch Stainless Steel
Ref. H76409140
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 line traces directly to the chronographs Hamilton supplied to the British Royal Air Force in the 1970s, and this reference wears that debt honestly rather than decoratively. The bi-compax layout — thirty-minute counter at three, small seconds at nine — is lifted from those instruments, and the Aviation Blue dial with its sunray finish reads as a working surface first, with painted Arabic numerals that belong in a cockpit rather than a boardroom. At 14.35mm thick it sits higher on the wrist than a casual 40mm case might suggest, which is the cost of housing a hand-wound movement with genuine depth to it. The H-51-Si is a modified cam-lever chronograph running at 4Hz with a silicon balance spring, meaning it shrugs off magnetic fields that would trouble a conventional lever escapement — a practical inheritance from the military brief. Sixty hours of reserve means a watch set down on Friday evening is still running Monday morning. The box-shaped sapphire adds a period note that flat crystals never quite manage, catching light at angles that flatten on more contemporary profiles. The mesh bracelet keeps the whole thing lighter than a solid-link alternative at this lug width, and the folding clasp adjusts finely enough that fit over a flight suit sleeve, or simply a shirt cuff, is not a compromise.
- Reference
- H76409140
- 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
- ETA 7753
- Functions
- Chronograph, Small seconds
- Water resistance
- 100m
- Bracelet / strap
- Mesh bracelet
- Strap colour
- Silver
- Clasp
- Folding clasp
- Lume
- Super-LumiNova
- Retailer
- Mappin & Webb
Additional specifications
- 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), Blue Dial Watches (778), Sports Watches (700) and Mesh Bracelet Watches (190).
What the specifications mean
Strengths
- 100m water resistance covers swimming and watersports
- 40mm suits most wrists
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
- One of Hamilton's more premium watches
Worth knowing
- 14.35mm thick, so it will not disappear under a cuff
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 | H76409140 | 85008M04 | 724.gb |
|---|---|---|---|
| Price | £2,050 | £2,105 | £1,780 |
| Case size | 40mm | 38mm | 38.5mm |
| Water resistance | 100m | 100m | 100m |
| Movement | Manual | Manual | Manual |
| Strap | Mesh bracelet | Stainless steel bracelet | 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.
Is 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
Mappin & Webb is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.
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