Tank Louis Cartier watch, XL, mechanical movement with manual winding caliber 430 MC. 18K pink gold case set with 42 brilliant-cut diamonds and beaded crown set with a brilliant-cut diamond, totaling 0.92 carats. Silver-grained dial. Blued-steel sword-shaped hands. Mineral crystal. Brown semi-matte alligator-skin strap with 18 mm double adjustable 18K pink gold folding buckle. Case dimensions: 40.4 mm x 34.9 mm. Case 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.