I also have the stereodeon that you are describing. I don't have a clue as to the value but thought I saw one (description of...no picture) that was being sold for $200.00 on e-bay. Just how much of a collectors item it is, I really don't know.
What you're describing is an authentic replica of the Noastalgic Square Grand Piano. My parents purchased it in the early 60's. Just when it was made, I don't know. Possibly sometime in the 50's. It was passed on to me along with the original operating instruction manual which includes a detailed diagram of transistor locations. I've basically kept it as a conversation piece. Not much information to offer you but it's interesting to read that someone else has one. I also would like to know if there is any collector's value to it.
What you're describing is an authentic replica of the Noastalgic Square Grand Piano. My parents purchased it in the early 60's. Just when it was made, I don't know. Possibly sometime in the 50's. It was passed on to me along with the original operating instruction manual which includes a detailed diagram of transistor locations. I've basically kept it as a conversation piece. Not much information to offer you but it's interesting to read that someone else has one. I also would like to know if there is any collector's value to it.