I Serie 1/21 (3/10/1954 - 20/2/1955)1/4 5/8 9/12 13/16 17/20 21II Serie 1/21 (27/2/1955 - 17/7/1955)1/4 5/8 9/12 13/16 17/20 21III Serie 1/21 (24/7/1955 - 11/12/1955)1/4 5/8 9/12 13/16 17/20 21