I bought this S/C last year at a yard sale for $20 from the daughter of the original owners. And guess what ?
It worked GREAT when plugged in. the Woofer bass is awsome but its starting to drift on the FM band.
It is one of those wierd ones where to get stereo, you can turn on both the AM and FM at the same time and make a sort of stereo sound with each band dedicated to one side of the split speakers. I took the back off and there is a TON of little tubes but never found a model number.