Each button carries 1966 copyright by “N.P.P. Inc.” as well as name of maker “Creative House Hse.” These vending machine distributed buttons are quite common in the 7/8” litho size but decidedly scarce in this 1” litho size. Two of the buttons in this group of 6 feature the red, green and yellow design variety while the other 4 feature the rwb/black variety. In the green version we have “Batman/Zop” and “Batman/Bruce Wayne.” In the blue variety we have “Batman/Pow” which has quite a few but quite tiny paint wear marks along with 3 that are closer to N. Mint and Mint including “Batmobile,” “I Am A Batman Crime Fighter” and “Batwoman.”