Lots of guitars and bases being built in the late '70s to very early '80s with that form of construction, mainly Japanese. Ibanez, Aria, Vantage, Washburn & Westone - to name but I few that I know of. Not all had a natural finish. Probably copying the Alembic style initially as Tweaky said, though there may may been others apart from Alembic doing it, though Alembic were certainly the best known.

DiMarzio pickups? Super distortions?