Lead designer Louis Cartier created the first Tortue watch in 1912. The case shape was inspired by that of a tortoise, hence the name. At a time when all wristwatches were round, the new design went on to become a classic. Cartier offers both ladies' and gents’ models in a full range of styles. The Tortue is available in steel and gold. It is also available in the jewellery range, set or fully paved with diamonds.