The early-1970s Bunker Pro-Bass was a radical instrument for its time, even though it wasn’t unusual for its inventor, Dave Bunker. Bunker was granted a patent on a headless guitar in May 1966 which he filed for in March 1965.
The ProStar series originated from Dave Bunker’s desire to create a petite, easy-to-tune guitar with tuners mounted on the body for the all-girl band he had in Las Vegas. The design conformed to what became the ProStar series. According to Bunker, the removable Gumby-shaped headstock was “strictly for show”.