Nice and intact 1971 example, came up for auction in May 2016 and sold for $1,775. Seller confirmed the serial number via e-mail and also said the pickup letter code is 'RB' or Rock Bass. This is one of our favorite pickups, and makes up for the lack of a second pickup. Guitar comes with the OHSC. Only issue we see is a missing thumb screw, and some general oxidation on most of the metal surfaces, although a gentle cleaning by the next owner should put things back to normal.
"1971 Dan Armstrong Lucite Clear Guitar, Has the Single coil Pick up. Swapable with a Humbucker (not included). In great shape for its age!!! Everything works. See all pics for condition. Has original case. Only one latch works."