Hamilton “Chronomatic Count-down”

Swiss Watch Fair 1971 BF 211
A new chronograph with automatic movement, designed for world travellers and airline pilots and personnel. An extra hour hand makes one dial revolution in 24 hours; along with two turning rings, one with 24-hour divisions and the other inscribed with the name of points around the world, it can show the time anywhere around the world, and in many time-zones at once. Hour and minute timers, calendar. The 5 lateral pushpieces and crowns are colourcoded. (HAMILTON “Chronomatic Count-down”)