A working chord organ. (With "Hot Wheels" stickers on it.)
When I was trying to figure out what the heck it meant by "Watts 30 VA", an AI chatbot tells me that the kind of notations on that manufacturer's sticker indicate it's from the mid-century. I've included the screenshot of that part of the chatbot. Internet search for "Electric Chord Organ" and "Model 1830" seems to prove the time period is accurate.
It's in storage now, so, if you want to test it, bring a sufficient power supply.
Price is firm. Thank you.
UPDATE: youtube link shows me turning it on and hitting all the keys:
https://youtu.be/OCoU5LBhaRg