Harmon Killebrew Signed Baseball. Harmon signed in blue pen on this Official American League Baseball. The ball has a touch of very light toning on some areas and it comes with a COA from CAS Authentication.

A note about CAS. Mike root who was a lead authenticator for JSA and SGC has now opened his own authentication business called CAS. Mike has been authenticating autographs for ITPC for many years and now will be doing it under the CAS name. Business as usual !

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