Help Identifying Basketball
 

I have a customer that has 20 or so of these. They are black and thick pretty thick cardboard. They appear to be cut from a box or something like that. The size varies from 2x2 to 3x2 to 4x2 or so.
https://www.nationalcardinvestors1.c...hamberlain.jpg
https://www.nationalcardinvestors1.c...amberlainb.jpg
https://www.nationalcardinvestors1.com/net_54/Lucas.jpg
https://www.nationalcardinvestors1.c..._54/Lucasb.jpg
https://www.nationalcardinvestors1.c...54/wilkens.jpg
https://www.nationalcardinvestors1.c...4/wilkensb.jpg