Autographed Diamond Matchbook
 

Hi-
I recently acquired the matchbook scanned below and I was wondering if anyone might be able to answer a few questions for me. It is a Charlie Grimm Diamond Matchbook that appears to have his autograph on it. Here are my questions:
1. Is this Charlie Grimm's signature? My rudimentary comparison with examples online seems to say it is, but I do not know for sure.
2. Do any of the Diamond matchbooks come with a preprinted signature?
3. Is anyone aware of other autographed Diamond matchbooks? Please post them if you have any!
Any additional information that could be provided is greatly appreciated.
Thanks in advance,
Alan Elefson
aelefson@hotmail.com