Does anyone know what this is? It is a Gibson. Made in USA is stamped on the back of the Headstock. It is a slab mahogany body with a bolt on neck. Large Headstock with Klusons. No pick guard which seems factory. And... It has a factory installed Moog active tone control circuit board with Zero Center speed knobs. I believe late 70s or early 80s. I was told it was a factory prototype when I picked it up in the late 80s used.
Serial# 80280065
Serial# 80280065
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