Here's another one in my collection, one that may have led to the boombox years later. An attempt at portable music from the 1960's- envision a group of teens dancing on the beach to some surf music.  A little bigger than a transistor radio at that time, it runs on three "C" cells and plays 45s and 33's. If you have a minute check out the video of it in operations here > http://www.youtube.com/watch?v=LNLKqNiS6Jg 

Sorry, things kind of fell apart towards the end.