I used this in a Rockabilly Act in the 80s. It's dated by the date codes on the pots.
Must be rare, I've never been able to find anyone who has ever seen one. Let me know if you have.
I purchased it on 48th St NYC in 1981. I wanted a Gretsch 6120 but this was a third the price.
From a late 1950s Supro Catalog
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