One of the more interesting of the cassette cases from the late-70s/early-80s is this Memorex case for the 'MRX' Oxide line of cassettes. Too bad the example of tape I have within is in lousy shape. Just to have something interesting, and because music just won't stick properly, I have recorded on it radio transmissions from the JFK assassination.
In case you're interested... this page has a selection of audio files that I put on the tape.
http://www.jfk-assassination.com/media/audio/radio.php
In case you're interested... this page has a selection of audio files that I put on the tape.
http://www.jfk-assassination.com/media/audio/radio.php