Rare James Sing Along Vintage Guitar Synth

This one was spotted on Craigslist and sent in via Kaden Harris. I don't believe I have ever seen one of these before. You will find two demos and a pic of the inside below.

From the listing: "I have this one of a kind guitar synth from about 1965. I've emailed many different gear professionals and none have ever seen one. I even got replys from Roger Mayer, Tom Oberheim, and guitar world. I was told it is a hand built prototype and I believe this could actually be one of the first guitar synthesizers ever made. I received it without the original power cord and guitar pickup. It has an obscure cinch jones 12 pin input so I bought the appropriate adapter and had a quarter inch jack connector installed. It has a new power cable. The unit passes signal and it has a bass octave tone that works. It has several organ tones but I can't seem to get them to do anything. Ideally it could use a modern synth pickup adapted to it and other work to get it going. I'm looking to trade it for a high end guitar. Here's a couple links for a demo https://www.instagram.com/p/BZYtezUA1eM/
https://www.instagram.com/p/BY9v6OYggKW/"

I have this one of a kind guitar synth from about 1965. I've emailed many different gear professionals and none have ever seen one. I even got replys from Roger Mayer, Tom Oberheim, and guitar world. I was told it is a hand built prototype and I believe this could actually be one of the first guitar synthesizers ever made. I received it without the original power cord and guitar pickup. It has an obscure cinch jones 12 pin input so I bought the appropriate adapter and had a quarter inch jack connector installed. It has a new power cable. The unit passes signal and it has a bass octave tone that works. It has several organ tones but I can't seem to get them to do anything. Ideally it could use a modern synth pickup adapted to it and other work to get it going. I'm looking to trade it for a high end guitar. Here's a couple links for a demo https://www.instagram.com/p/BZYtezUA1eM/
https://www.instagram.com/p/BY9v6OYggKW/.

Making a little headway on the #james #singalong #guitarsynth . Need some parts to arrive so I can try to interface it with a #rolandgk2 . Would still love it if anyone had any info on this beast. #vintagegear #guitareffects

A post shared by Jay P (@guitardweeb) on Sep 23, 2017 at 7:00am PDT

Anyone ever see one of these? Newest date stamp on anything inside is 1965. 12 pin input, 2 1/4" outs (there are 2 identical channels). Nothing labeled lol. Really want to get it back in working order. I cant find ANY information on it. #james #singalong #vintage #guitarsynth #1960s #organ #stompbox #guitareffects

A post shared by Jay P (@guitardweeb) on Sep 12, 2017 at 7:42pm PDT