Cartier, Clé de Cartier, ref. 3850, watch in steel and 750 rose gold, circa 2015
Movement: cal. 1847 MC, automatic, 23 jewels
Case: n°259240VX, diam. 39 mm, glass back revealing the movement
Complication: date window
Signature: dial, movement, case, bracelet
Accessories: certificate and warranty stating the date of purchase 12/23/2015, instruction manual