Tank Louis Cartier watch, large model, quartz movement. Case in 18K yellow gold, beaded crown set with a sapphire cabochon, silvered grained dial, sword-shaped hands in blued steel, mineral crystal, alligator-skin strap with ardillon buckle in 18K yellow gold, calendar aperture at 3 o'clock. Case dimensions: 33.7 mm x 25.5 mm, 6.35 mm thick. Water-resistant to 30 metres/100 feet.
Worn by Louis Cartier himself, the “Tank Louis Cartier” watch sets the standard to be upheld by all Tank watches. In contrast to the assertive choice of rectangular form and proud lines, the tops of the lugs were rounded, embodying the contribution made by Louis Cartier to the modern style later known as Art Deco.