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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 58 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
- 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
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.
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.
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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