Watch

Reference : H77796135

Caliber : H-21-Si

Collection : Khaki Aviation

Movement : Automatic

Case size : 45mm

Thickness (mm) : 14.85

Dial color : Black

Case material : Stainless steel

Crystal : Sapphire

Lug width : 22mm

Power reserve : 60 hour

Water Resistance : 10 bar (100m)/145 psi (328ft)

Anti Reflection : Yes

Open Case Back : Yes

Screw Down Crown : Yes

Silicon Balance Spring : Yes

Bracelet/Strap

Strap reference : H605.777.102

Strap type : Stainless steel

Buckle type : Folding clasp

Buckle width : 20mm

H-21-Si

The H-21-Si is an automatic 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 powerful caliber reliably keeps and measures time via two or three sub dials at 6

9 and/or 12 o’clock

and start/stop and reset pushers on the side.

Description

The 2018 Khaki X-Wind Auto Chrono Limited Edition is packed with technical aviation features for pilots including Hamilton’s ground-breaking drift angle calculator. Limited to just 1,918 pieces, it uses the H-21-Si, the first Hamilton chronograph movement with a silicon hairspring which has been precision certified by COSC as a chronometer.