The OP's question involved 50 years ago, not 30-40.

I'm not pointing this out to be a PITA, but because of a point in a previous post, that a lot of people who'll answer don't really know what the state of the art was 50 years ago, either because they weren't born yet, or if they were couldn't afford good stuff.


“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck