This watch is a replica of a model created in 1944. Since 1920 Audemars Piguet appeared to be a great specialist of wrist-watches with calendar showing the triple date and the moon phases. In 1978 they create an extra-flat self-winding movement and equip it with a perpetual calendar system. The tlatest movement in the world was made by Audemars Piguet in 1946 and still appear in some of the classics of the House.