I’ve got a replica Roman bronze coin that looks like the first coin in the picture, down to the corrosion.
I think it came in the mail from Readers Digest in the 1960s, in an ad for some book they were pushing.
That story rings a bell... I think we had something like that as well — it was plastic though, and was used to scrape off the scratch-and-sniff coating to see how much we’d won or whatever (we won nothing of course).