Historically a prominent participant – and winner – at observatory chronometer trials, Longines once had a stable of extra-precise, high-frequency movements, though the calibres have been long discontinued as were the chronometer competitions. Several decades later the watchmaker from Saint Imier pays homage to that history by reviving the Ultra-Chron, which is based on its namesake … Continue reading Longines Introduces the Ultra-Chron High-Beat Diver A return to the arena of high-frequency timekeeping.