LANGE 1 MOON PHASE
Perfection for every day – and every night
The average lunar month lasts 29 days, 12 hours, 44 minutes and 3 seconds. Simplified moon-phase displays round the cycle down to 29.5 days. This inaccuracy adds up to a deviation of one day after two and a half years. The LANGE 1 MOON PHASE tracks the lunar cycle with an accuracy of 99.998 per cent. Once correctly set, the display has to be corrected by one day after 122.6 years, assuming the watch runs without interruption.