Early to mid 70's Ernie Ball Earthwood ABG Bass

Standard depth (just over 6 inches!) walnut body
Maple neck (professionally reset without the tilt-adjuster)
Original style maple fingerboard
Original style bridge
Ernie Ball Earthwood strings (80/20 bronze)
No pickup

Sporadic production from 1972 - 1985, approximately 1,000 made.
The first ABG (acoustic bass guitar) designed to produce a real bass sound.