Cartier Tank Louis Cartier

Cartier lists the Tank Louis Cartier reference WGTA0431 as a platinum watch with a rectangular case. The case measures 27.75 x 38.1 mm and is 8.18 mm thick. Platinum 950/1000 is used for both the case and the beaded crown, which is set with a cabochon ruby. Calibre 1899 MC is a self-winding mechanical movement with a 39 hour power reserve. The dial is stamped silvered metal with yellow varnish, and the hands are blued steel and sword-shaped. A semi-matte burgundy calfskin leather strap carries a platinum 950/1000 ardillon buckle. Cartier rates the case to 30 metres.