You can have an authenticator like Spence or My suggestion GAI do an online cert of the sig. The cost is about $7 I think. I guess if it passes that send it in and have it slabbed for about $30 + shipping and they can handle the auction setup if you want. Very valuable if it is real considering I have NEVER seen a Cobb with the middle name signed anywhere. Not saying it is not possible but it throws alot of ???????????