The Tortue watch, a tortoise-inspired shape, was a groundbreaking design that went on to become a classic. Mechanical movement with manual winding, Cartier caliber 430 MC. Medium model in solid 18k rose gold case and brown Leather Strap with Pattern. Silvered guilloche dial with sunray effect, blued-steel sword-shaped hands. Octagonal crown set with a faceted sapphire. Case dimensions: 39mm x 31mm. Case thickness: 8.6mm. Water resistant to 30 meters/100 feet.