Well, friends...I went to check her out and she followed me home. Excellent condition, one owner, from 1981. Apparently it had been sitting on the rack at Chuck Levin's near DC for a few years and then was sold to the previous owner in 1983. He clearly babied it. I've always wanted an early 80s Series bass and this is a gorgeous specimen. Everything appears in great shape.
Only thing that seems a little odd is that the brass block has a 2 different sized holes which allows the nut on the underside of the bridge on the G string side to be lowered all the way. Seems odd so I started a thread on the Troubleshooting page to get some insight.