The Hamilton Khaki X-Mach watch allows to measure the Mach number of an aircraft, implying the speed an aircraft is moving through the air divided by the speed of sound under the same atmospheric conditions.
The Khaki X-Mach watch may be rightfully considered to represent a unique portable Machmeter. To make the watch show the Mach number in ISA (meaning International Standard Atmosphere) conditions on the bezel, the pilot has to turn the right crown and thus set the pressure altitude (PA) and calibrated air speed (CAS) measured by the instrument found in the cockpit.
demonstrates aviation-themed elements, including wing-like metal and carbon-fiber surrounds for the protection of the crowns. The bracelet features flying-jacket style stitching and studs. Tiny red accents on the watch case and dial have been suggested by high-precision cockpit instruments. The crown and the case-back have a red compass-style arrowhead as a symbol of speed.
The Hamilton Khaki X-Mach watch has been created in a few variations, all of them with a smooth black dial. The dial is completed by easy-to-read silvery indices and matching counter frames. It is protected by a sapphire crystal.
The Hamilton Khaki X-Mach watch, reviewed by Watches.InfoNIAC.com, is coupled with a brown leather strap perfectly matching the flying jackets, headgear and gloves of the past. It is also available on a contemporary black leather or rubber strap. The timepiece is 100-meter water-resistant.
The price of the watch is approximately 1645 US dollars.
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