BTW, when you mean vintage cable boxes, Hamlin comes to mind. 96-year-old Philip Hamlin, Senior, was murdered by a hired hand just days ago a few miles from my home. There used to be a huge factory south of Seattle where, I assume, they built product in the 1960's or so.
And, here's a cool collection of vintage cable and pay-tv decoders:
http://theoldcatvequipmentmuseum.org/170/173/1731/