Cartier Tank Louis Yellow Gold Brown Leather Strap Mens Watch W1529756 Card. Quartz movement. 18k yellow gold case 25.0 x 33.0 mm. Circular grained crown set with a blue sapphire cabochon. . Scratch-resistant mineral crystal. Silvered opaline dial with black Roman numeral hour markers and an inner minute track. Sword-shaped blue hands. Date calendar at 3 o'clock aperture. Secret Cartier signature at VII. Brown leather strap with 18K yellow gold tang buckle.