Tank Louis Cartier watch, XL, Manufacture mechanical movement with manual winding caliber 9753 MC, 18K pink gold case, beaded 18K pink gold crown set with a sapphire cabochon, silvered flinqué dial with sunray effect, Roman numerals, blued-steel sword-shaped hands, mineral crystal, brown semi-matte alligator-skin strap with adjustable 18K pink gold folding buckle, calendar aperture at 12 o'clock, power-reserve disc at 6 o'clock, sapphire case back. Case dimensions: 39.2 mm x 30 mm, thickness: 8.3 mm. Water-resistant to 3 bar (30 meters/100 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.