This Autographed 4x5 Photo has been Personally Signed by Harmon Killebrew of the Minnesota Twins. This item is 100% Authentic, it comes slabbed and authenticated by PSA/DNA. The authenticity can be verified on Professional Sports Authenticator website. Press Pass Collectibles only offers Authentic Autographs by Harmon Killebrew through Signings, In-Person Signings or Private Collections to include a 100% money back Lifetime Authenticity Guarantee.