Cartier have revived their classic Ballon Bleu line of watches of the earlier half of last century. The Ballon Bleu collection is named after the spherical blue crown which is enclosed within the case of the watch. The watch is available in a Grand Modele at 42mm, a Moyenne Modele at 36mm and a Petit Modele at 28mm. The Cartier Ballon Bleu collection is available in yellow, white, grey and rose gold as well as steel.