Cartier Men's W51005Q4 Tank Francaise Automatic Stainless Steel and 18K Gold Watch Swiss Made watch with Cartier Calibre 120 Swiss-automatic movement; Functions without a battery; Powers automatically with the movement of your arms Scratch-resistant-sapphire crystal; Case diameter: 28 mm Solid rectangular combination brushed and polished stainless steel and 18kt gold case and bracelet Roman numeral white-guilloche dial; Blued steel sword-shaped hands; Date window at 6 o'clock; 18kt yellow gold octagonal-shaped crown with spinel crystal accent Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion