General Information
•First model of the Trilogy,
presented in 1985
•First watch that sensitizes us for the things happening in the sky
•Dial is available for every Latitude
•Perpetual Calendar has never to be adjusted
•Automatic Movement UN-97
with 18K Rotor
•Quick Adjustment forwards and backwards over a single crown
The first astrolabes are known to have existed before 150 B.C. and served mainly two purposes; to observe and to display. Observation of the sky had mainly one purpose: to determine the correct date and time. Thanks to the watch movement inside the Ulysse Nardin Astrolabium, the purpose of observation has become obsolete and the main purpose today is to display the sky and its celestial bodies above us. It can also be used to predict astronomical events, for example the next eclipse of the sun or the time of sunset at any given date.
It is the first watch that sensitizes us for the things happening in the sky and makes us become a better observer of nature and the stars above: The Dragon hand circles around the Ecliptic once every 18.611 years! Seconds, Minutes, Hours and even Dates are therefore becoming almost irrelevant. What counts is the movement of Earth, Sun, Moon and the Stars.
Perpetual Calendar is exactly synchronized with the movement of the Earth around the Sun of 365 days, 5 hours, 48 minutes and 46 seconds. It therefore is the only Perpetual Calendar which has never to be adjusted!