Tortue watch, small model, Manufacture mechanical movement with manual winding, calibre 8970 MC. Case in 18K rose gold, length: 30 mm, width: 24 mm, thickness: 7. 3 mm, octagonal crown set with a faceted sapphire, silvered guilloché dial with sunray effect, sword-shaped hands in blued steel, strap in brown alligator skin, ardillon buckle in 18K rose gold, water-resistant to 3 bar (~30 metres).Pioneering designer Louis Cartier imagined a tortoise-inspired watch, the Tortue, in 1912. At a time when all watches were round, the groundbreaking design went on to earn the status of a classic. Cartier offers both ladies' and men's models in a full range of styles, available in gold, at times set or fully paved with diamonds.