- Reference H76409530
- Caliber H-51-Si
- Collection Khaki Aviation
- Movement Mechanical
- Watch Function Chronograph
- Case size 40mm
- Thickness (mm) 14.35
- Dial color Black
- Case material Stainless steel
- Crystal sapphire
- Lug width 22mm
- Power reserve 60 hour
- Status Current collection
- Water Resistance 10 bar (100m)
- Anti Reflection Yes
- Silicon Balance Spring Yes
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- Khaki Aviation Pilot Pioneer Mechanical Chrono
Khaki Aviation Pilot Pioneer Mechanical Chrono
Discover our collection of rugged military watches
- Strap reference H6000001151
- Strap type Cow leather
- Buckle type H-Buckle
- Buckle width 22_buckle
H-51-Si
The H-51-Si is a mechanical chronograph movement featuring a state-of-the-art balance spring made from the anti-magnetic material silicon for enhanced resistance to extreme atmospheric conditions. With an extended 60-hour power reserve, this hand-wound caliber keeps and measures time via an iconic dial complete with start/stop and reset pushers. With no rotor and no date function, this interactive movement brings modern reliability and precision to signature, vintage-inspired design.
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Delivery
We offer express delivery for all orders. Place your order before 11:30am today and get it delivered next working days!
To find out more information about our delivery, please visit “Delivery”. -
Return
We offer free returns within 14 days from delivery. For more information, please visit “Returns Policy”
Features
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MANUAL WINDING
Wind your mechanical watch by turning the crown clockwise.
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STAINLESS STEEL CASE
A highly resistant alloy composed of steel and chromium. It can be worked to resemble a precious metal. It is nearly impervious to rust, tarnish, and corrosion.
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Sapphire Crystal
Synthetic sapphire crystal is a tough scratch-resistant material, only diamonds could leave a mark.
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SILICON BALANCE SPRING
Silicon balance springs offer various advantages: immune to magnetic fields, temperature fluctuations, oxidation, aging, shocks, and maintains shape stability.
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WATER RESISTANCE
Your timepiece is resistant up to 10 bar (100m) / 145 psi (328 ft).
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KHAKI AVIATIONThe Khaki Aviation collection perfectly displays Hamilton's technical know-how when it comes to creating reliable watches for pilots and urban aviators.



















