Ulysse Nardin. A Fine Limited Edition 18k Gold Automatic Perpetual Calendar Astronomical WristwatchSigned Ulysse Nardin, Astrolabium Galileo Galilei, No. 103, Ref. 991-77, Circa 2002Cal. UN97 finely engraved gilt-finished automatic jewelled movement, pierced and engraved rotor, three-toned silvered, light grey, and dark grey dial, analogical and perpetual representation of the Gregorian calendar, solar hand indicating solar hours, sunrise, sunset, dawn, and dusk, moon hand indicating the rise and fall of the moon, indication for month on outer ring, aperture for day in English at 6 o'clock, indications on the dial for zodiac sign, location of the sun, equinox and solstice, cardinal points and temporal hours, solar and lunar eclipses, circular case, bezel with inlaid black enamel Roman numerals and Arabic 24 hour indication, down-turned lugs, sapphire crystal display back secured by four screws, 18k gold Ulysse Nardin buckle, case, dial, and movement signed40mm diam.