Launched at SIHH 2010, the Cartier Tortue Perpetual Calendar is one of the most complicated novelties amongst the collection. The Tortue collection rooted back to 1915 with an important significance in Cartier’s heritage. The present Cartier Tortue embodies a spectacular complication with an unusual design. Impressive sized at 45mm in width, the timepiece was available in precious metal such as white gold and like the present example pink gold. Demonstrating fine watchmaking, the Cartier Tortue Perpetual Calendar exhibits a three-dimensional architecture with a stunning open-worked dial. Featuring a monotoned slate grey dial with classic Roman numeral hour markers, the dates are cleverly marked along the edge of the Tortue case shape indicated by an elongated blued steel hand. The days of the week are indicated across the bottom half of the dial with an interesting retrograde display from Monday through Sunday. Preserved in an attractive condition with strong wrist presence, the present Cartier Tortue Perpetual Calendar is without a doubt a collectible complication by the Parisian House.