When were they established

The quality has dropped substantially and I stopped going.

Early 70s. I believe at the Norwood location they have the first dollar they made hanging on the wall. Also they have other historical things on premise from their beginning days. I would go in and ask.

I read online 1973

I don't know for sure, but they've been around since at least 1984 (my first visit). Probably older than that.