At the beginning of the 1970s, the British Ministry of Defence (MoD) revised the Defence Standard (DEF-STAN) that defined the specification of military pilots’ wristwatches. The changes outlined in DEF-STAN 66-4 (Part 2) in April 1970 allowed the use of a more economically viable and mass-produced double-pusher chronograph movement, this being the Valjoux 7733. For the … Continue reading A Hero’s Hamilton