Personalized note with autograph isn't worth anything I imagine but pretty neat. Larry's favorite player.
To his credit, Spahn was a willing signer for many years.....Since this autograph is on a 64 Topps Giant card, this may appeal to someone trying to get the entre set autographed (although the personalization doesn't help).
I'd value it in the $25 range.
Very very nice !
I got one on an index card TTM, that's all.