Tank Louis Cartier Skeleton Sapphire watch, 30 mm x 39.2 mm, Manufacture manual winding mechanical movement, caliber 9622 MC. 18K pink gold case, beaded 18K pink gold crown set with a blue sapphire cabochon, blued-steel sword-shaped hands. Brown alligator skin strap, double adjustable folding 18K pink gold buckle. Skeleton hours, minutes and small seconds complication. Movement consisting of 159 parts including 21 jewels. Total movement dimensions: 26 mm x 26.3 mm, movement thickness: 3.6 mm, balance: 28,800 vibrations/hour, power reserve approx. 3 days. Sapphire crystal and case back. Case thickness: 7.45 mm. Water-resistant to 3 bar (approx. 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.