Musial is an interesting one. It's from spring 1942—so leading into his rookie season. It makes it among his first autographs. At some point then he changed his signature into his autograph with the classic 'S'. There are signatures, signed forms and the such, that also show him once signing this way. When he changed and how relatively rare that makes this is something I'm trying to find out.
As I know it's real, this is one I will probably look into authenticating in the best way. Luckily it might also be the signature in best condition and without others around it.
