Hamilton has a limited edition Khaki model out now, here’s the press info;

Our high-performance Khaki Aviation Converter Automatic Chronograph is now available in a thrilling new look that celebrates the continuation of our partnership with Air Zermatt. Limited to 988 pieces – one for every mission to the Matterhorn from 1968 – the special edition features glacier-blue sub dials and accent markings and a bright red seconds hand, a nod to the colors of the rescue team’s well-recognized helicopters.

Air Zermatt’s distinct logo is printed on the timepiece’s open case back that offers a peek at our exclusive H-21-Si chronograph movement developed with a superior anti-magnetic silicon balance spring to ensure accuracy in the most perilous environments.

An exhilarating watch for pilots, adventurers, aviation enthusiasts and fans of mountain life, the Khaki Aviation Converter Automatic Chronograph Air Zermatt Edition has stellar form and function. Designed for both the thrill and skill of flying, it features a logarithmic ‘slide-rule’ bezel that enables pilots to perform crucial calculations for critical factors like airspeed, distance and fuel consumption, during flight.

The UK price is around £1800 by the way.