Hamilton Khaki Aviation Converter Auto Chrono is engineered for pilots and adventurers who demand precision and function at altitude. Featuring a bi-directional rotating slide-rule bezel, it allows for on-the-fly calculations of conversions, speed, fuel consumption, and other essential metrics, making it an indispensable cockpit companion.

Powered by the advanced H-21-Si automatic chronograph movement, this timepiece offers a 60-hour power reserve and silicon balance spring for anti-magnetic stability and enduring accuracy. The 44mm stainless steel case, paired with a deep blue dial and brown cow leather strap, exudes classic aviation heritage with a modern twist.

Technical Specifications

Movement

• Caliber: H-21-Si Automatic Chronograph

• Functions: Chronograph, Day, Date, Tachymeter

• Power Reserve: 60 hours

• Features: Silicon balance spring for enhanced anti-magnetic resistance and stability

Case

• Material: Stainless steel

• Diameter: 44 mm

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

• Crown: Screw-down crown

• Case Back: Open case back

Dial

• Color: Blue with aviation-inspired markers

• Features: Rotating slide-rule bezel for quick in-flight conversions, luminous hands and markers for readability in all lighting conditions

Glass

• Sapphire crystal with anti-reflective coating

Bracelet / Strap

• Type: Cow leather strap

• Color: Brown

• Lug Width: 22 mm

• Buckle: H-Buckle (22 mm width)

Combining professional-grade aviation utility with the Hamilton Khaki Aviation Converter Auto Chrono H76746540 is a high-performance timepiece that bridges technical mastery and timeless style—ready to navigate the skies or your next adventure on land.