Tank Louis Cartier watch Part number: WGTA0342 Product characteristics Tank Louis Cartier watch, sm, quartz movement. Case in yellow gold 750/1000, pearly decorated crown set with a sapphire cabochon, silvered grained dial, sword-shaped blued-steel hands, mineral crystal, alligator-skin strap, ardillon buckle in yellow gold 750/1000. Case size: 29.5 mm x 22 mm, thickness: 6.35 mm. Introduction to the Collection The Tank Louis Cartier, a favorite of Louis Cartier himself, is the starting point of the Tank series. The rectangular shape, bold lines, and rounded corners of the attachments were modern details that Louis Cartier would later adopt in the Art Deco style. The modern details introduced by Louis Cartier were the precursors of what would later become known as the Art Deco style.