Each is 1.75". Group begins with 1939. Next from 1940 has pair of 1/16" marks on the celluloid above and below the date numeral "9." Next from 1941 includes the paper license folded into the reverse compartment. Following years are 1943, 1946, 1947, 1948, 1951, 1952, 1953, 1955, 1956, 1958, 1959. The 1953 had a few dots of silver paint on left edge which have come off but it also has some dark tan stain at the very bottom and smaller amount at far left. The 1958 also has small area of light stain at lower right and dot on rim edge at left. Unless noted all are exceptionally clean and Exc. with most displaying Mint. Also see early Ducks Unlimited and other fishing items #673-675.