This is an amazing item in C-10 condition from the original manufacturer of the 1966 buttons.
This button was part of a promotion inside the Batman #1 World Adventure Library comic book from 1966. You had to send in the ad order form from inside the comic book and send in 35 cents for the button or you could send in 10 cents for just the member card. Many children did not order the button but paid the 10 cents to get the member card instead to save money. The membership was also offered through the TV show running in 1966 at the same time.
Later you could buy the badge for 39 cents at your local drugstore.
I have a full box but this is for ONE button and not a full box.
The edge has "Button World Manufacturing B'klyn 36 NY Official Licensee Copyright 1966 National Periodical Publications Inc."
This is an original button with the maker, copyright, and the rough edging where the outerwrap was stretched and applied to the button. If the edge of one of these buttons is smooth, then it may be a reproduction. This one is guaranteed to be authentic.
See the photos. From an original paper box case. You’re badge is loose and not in a package.
Let me know if you have any questions.