I Have several sets of Barris Kustoms of the 50's. 3 sets are autographed (Pic of Barris on go-cart and HR Logo BC Ethic with Hot Rod). The other set is not autographed and has a picture of Barris on one side and the kustoms of the 50's car on the other. Why the difference? Was a different set issued for autograph/non autographed sets? Chips are the same in all sets. Any help with value appreciated Thanks for the help!