W1556222Ref

The Rotonde de Cartier is known for its traditional round case and straight lugs, often serving as a platform for complex movements. The Earth and Moon reference W1556222, launched in 2013, features a platinum case and a lapis lazuli dial with a white gold Roman grid, with 50 units produced; a version with a baguette diamond-set case was also released, limited to 15 pieces.