In my humble opinion this is a Secretarial signature
Yeah, I'm thinking the same...But I do not know anything myself about Flynns signing habits. A friend of mine is thinking of buying it and I promised to ask around.
Hi, I know this is a bit late, but I just joined. Signature is authentic, in my opinion, and dates from about 1935 to 1939 when Flynn personally signed autograph requests. Phil F.