I've never heard of it, but coincidentally (maybe?) 8" on the diagonal is ~11" Edit: Or its a Videodisc, they were 10-12", and in a cassette -- https://en.m.wi

I've never heard of it, but coincidentally (maybe?) 8" on the diagonal is ~11" Edit: Or its a Videodisc, they were 10-12", and in a cassette -- https://en.m.wikipedia.org/wiki/Videodisc https://en.m.wikipedia.org/wiki/Videodisc