C. Two-body, polished and brushed, steel case back and yellow gold bezel fixed with 8 screws, protected octagonal.sapphire-set winding-crown, sapphire crystal. D. Guilloche silver with painted radial Roman numerals, secret Cartier.signature on the XI, concentric minute track, aperture for the date between 4 & 5. Blued steel epée hands..M. Cal. 220, rhodium-plated, fausses côtes decoration, 25 jewels, straight-line lever escapement, monometallic.balance, self-compensating flat balance spring..Dial, case and movement signed..Dim. 25 x 35 mm. Thickness: 9 mm.