Cartier Tortue Perpetual Calendar Watch - 45.6 mm White Gold Case - Black Alligator Strap - W1580048 Tortue bezel set with 24 baguette

bezel set with 24 baguette diamonds

Celestial dial with black sapphire-crystal disks for sky background and moon phases and transparent sapphire-crystal disk for sky chart and Milky Way

41 mm stainless steel case

bezel set with 48 orange to yellow gradient baguette-cut sapphires

Cartier Tortue Perpetual Calendar Watch - 45.6 mm White Gold Case - Black Alligator Strap - W1580048 Tortue bezel set with 24 baguette45. 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