ULYSSE NARDIN fine & rare Astrolabium Galileo Galilei

ULYSSE NARDIN fine & rare, astronomical 18k yellow gold gents wristwatch astrolabe Galileo Galilei, Switzerland around 1992, self winding, reference 911-22, polished solid, 3- piece construction case including original leather strap with gold-plated original buckle, on both sides glazed, case back screwed-down 4-times, bezel with black Roman numerals, dial as astrolabe with horizon and revolving heaven, by hand engraved gold-plated lever movement, 18k yellow gold central rotor, 33 jewels, calibre UN-97, precision adjustment, diameter approx. 40 mm, UN box, condition 2-3, from the estate of a collector