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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 58 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
- 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
- Goldsmiths
Additional specifications
- Power reserve
- 60 hours
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.
Will the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Does it need a battery?
No. It is hand-wound, so it needs winding every day or two but never a battery.
How 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
Goldsmiths is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.
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