caliber 324 S QA LU self-winding movement with annual calendar
Celestial dial with black sapphire-crystal disks for sky background and moon phases and transparent sapphire-crystal disk for sky chart and Milky Way
matt black dial with diamond hour markers
18K yellow gold domed bezel set with diamonds
Cartier Tortue Perpetual Calendar Watch - 45.6 mm White Gold Case - Black Alligator Strap - W1580048 Tortue caliber 324 S QA LU45. 6mm x 51mm 18K white gold case, 16mm thick, sapphire back, octagonal crown set with a sapphire, sapphire crystal, slate dial with openwork satin brushed silvered grid, sunray finish, black transferred Roman numerals, snailed counter, apple shaped blued steel hours and minutes hands, caliber 9422 MC automatic movement , perpetual calendar with days displayed by a retrograde hand, and months and leap years in a counter at 12 o'clock, approximately