Is this a REAL Mantle Autograph??
 

I have never seen a Mantle look quite like this...especially from the late 50's...PSA authenticated it, but I believe they goofed....

https://imgsrv.sellersourcebook.com/...jpg?1509304760

???

Have you seen exemplars from that period? He signed similar to this from 1954-1960ish. The signature is so faint it's hard to even see enough of it to form a valid opinion, but I would likely trust PSA/DNA on this one.