Contax IIa P, 97,001-100,000, 11/1949 to 6/1950 S, 20,001-28,000, 7/1950 to 4/1951 T, 5,001-9,000, 3/1951 to 7/1951 T, 28,001-35,000, 8/1951 to 12/1951 U, 1-5,000, 1/1952 to 5/1952 V, 15,001-20,000, 7/1952 to 8/1952 X, 1-3,000, 9/1952 to 10/1952 Y, 57,001-62,001, 11/1952 to 3/1953 A, 43,001-46,001, 4/1953 to 10/1953 A, 46,000-53,000, 11/1953 to 9/1954 B, 90,001-95,000, 10/1954 to 2/1955 F, 20,00..