They sound fantastic, very analog and very warm. I have never heard a sound like this, incredible. Just wish I knew more about them. Anyone?

Yes, they take 1 AA battery. They are red, and the box is white.  

    Hey everyone, I picked up some vintage headphones at a garage sale this week. I can't find any info about them at all. I managed to find some info on the later JVC HM-200E (with the dummy head) model, but this model turns up nothing. What do I have in my hands in terms of collector's value...