18k nickel lever movement with bridges finely chased and engraved with foliate scrolls pierced and engraved rotor glucydur balance the dial composed of 6 revolving blue rings each featuring a planet (Mercury Venus Earth Mars Jupiter and Saturn) the rings rotating around the centre representing the sun the moon rotating around the earth outer ring calibrated for months and zodiacs rotating once a year the domed sapphire crystal subdivided in 12 sectors that start from the centre (Earth) and radiate outward the bezel engraved with Roman numerals polished circular case with sapphire crystal display case back case dial and movement signed with an 18k gold Ulysse Nardin bracelet and twin folding clasp