Astronomical moonphase, meaning the moonphase is very accurate. How accurate? With only one day of deviation every 122 years! Many people say, why is it necessary? And how would I know if it’s really 122 years – I won’t live to see it! All these accuracy can be proven mathematically. (Much like the perpetual calendar) Hand wound AS1512 movement, 5N Red gold 42mm case, 90hr power reserve, priced at CHF 25,500. ¬†Launched in 2013