In this restoration video by C Spinner Watch Restorations, a 1943 Waltham A-11 World War II military watch undergoes a complete mechanical and aesthetic overhaul. The video highlights the A-11’s iconic “hacking” feature, which allows pilots and navigators to synchronize their timepieces to the second by mechanically halting the balance wheel when the crown is pulled. The restoration involves replacing a damaged balance staff using specialized tools, static poising of the balance wheel for consistent timekeeping across positions, and replating the worn brass case with nickel to preserve its historical character. This detailed walkthrough showcases the precision engineering of the “watch that won the war” and the meticulous craftsmanship required to bring an 80-year-old service piece back to life.