While there are forgeries in the market for Eddie Mathews, the majority are found on 500 Club HR Balls with forged Mantles and Williams. Eddie was a generous signer, and was active in the show circuit until he fell ill. I've observed that as Eddie aged, his spacing between letters changed. His earlier examples were a bit tighter between the letters. There are some neat examples with his full name of Edwin which show a nice penmanship.