HEMCO Stereovision - Info?

Hello all!

I'm trying to help a friend identify this odd-ball device...It's called the Hemco Stereovision and (surprisingly) I can't find anything about it via Google.

From the front, it appears to be a simple 19" tv but there are no inputs for it beyond two RCA plugs in the back...one is labeled Horizontal and the other Vertical. At the top are dials with labels of "CRT Modulation", "Gain", "Balance", "Brightness", and "Phase". I'll try to include photos...

My best guess is that this device is/was a rudimentary musical visualizer from back in the day but that is just a guess. We'd love to get some info on this or know how it was supposed to connect and if something is missing...anything really.

Thank you all for your time,

Jorge

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Long time ago a device with similar construcition was used in my school, as a kind of oscilloscope to demonstrate electrical waves and Lissjous patterns to pupils, It has also only two inputs and senitivity and brightness control.

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