Heard back from seller, he is sending me more pics, will post them here. The bass came from Nashville and was well played he said by a session player - finish is worn off back of the neck. I think Dee Murray ended his career as a session player in Nashville and he played a 1K (I read in bassplayer mag it's displayed somewhere in Nashville), so this is the lefty Dee I guess
. I posted this on the G&L bass forum, and one of the guys said it looks like the bridge pup was added - a little sloppy on the routing. So maybe 2nd switch is pickup selector switch, which would make it a passive L2K type. The seller says it sounds and plays great. he is looking for offers. I might make one but I will def post pics here if any of you are interested. I need another four string like . . . well you know.