Modern Craftsman Series (generally 1947 and later, some exceptions):
AZ-circle = J.H. Williams & Co, ca. 1955 - 1967
BF = probably Daido, possibly KTC, Japanese made, ca 1969 - 1987
C = likely Crescent division of Cooper Industries, ca. 1964 - 1973
C = Stanley Works, Taiwanese made, ca. ? -...