Tank Louis Cartier watch, XL, Manufacture mechanical movement with manual winding caliber 430 MC. 18K pink gold case, beaded crown set with a sapphire cabochon, silver-grained dial, blued-steel sword-shaped hands, mineral crystal, alligator-skin strap with 18K pink gold ardillon buckle. Case dimensions: 40.40 mm x 34.92 mm, thickness: 5.1 mm. Water-resistant to 20 meters/60 feet.
Worn by Louis Cartier himself, the “Tank Louis Cartier” watch sets the standard for all Tank watches. To embody Louis Cartier's contribution to “modern style”, later known as Art Deco, the tops of the lugs were rounded in contrast to the previously fashionable rectangular form and proud lines.