It would be super freaky for someone in the early 90's to make up a box for an obscure event which never took place, and use the silver labels.
That would blow my mind.
I can accept today's scam artists being that crafty but were marbles that big back then? How long had they been big business? Long enough for people to come up with ideas like that?
Well, now that you have my head asploding, I better get to searching.