Question: how do you date aa badges?
Answer: 1 to 999,999 = issuing date between 1906 and 1930.
A – P suffix = issuing date between 1930 and 1945.
RST suffix = issuing date between 1946 and 1956 [flat motorcycle badges]
WXYZA suffix = issuing date between 1956 and 1967 [domed motorcycle badges]