Advanced technology for the sophisticated aviator. Calculate critical conversions and metrics at a glance with the Khaki Aviation Converter Auto Chrono’s bi-directional, rotating slide-rule bezel. This high-performance tool converts units, such as feet to meters or miles to kilometers, and currency. Add in the H-21-Si automatic chronograph movement with its superior anti-magnetic silicon hairspring and this stylish 44mm pilot’s watch has everything you need for your next adventure in the sky.