I ran into this instrument many years ago at a guitar show in Dallas, TX. I played it for about an hour or so. I really was digging it, but it was not for me. Too many strings. The serial number of this one by the way is 72-17. I remember because it was the next one made after the bass I have 72-16.
They guy trying to sell it at the guitar show said that not only was it made for Jack (he actually said Jefferson Airplane), but that some part of the wood of that instrument came from Alcatraz. Who knows. Maybe.
At the time it was for sale for a LOT less. I remember it being under 2K.
Michael