There it is... hadn't seen that graphite-necked short-scale in almost 10 years. Looks like it's in great shape. According to the History page, Stanley Clarke had the other prototype.
I was at John's a month or so ago, and all of his basses and equipment are very lovingly cared for. He told me he personally restrung his basses after each performance, and when I saw what he had at the house, I was amazed at the condition of his basses which had been around the World continuously for the past 50 years. His Alembic #24, was in virtually the same condition as when it left the shop in 1974. Power supply, F2B, etc. were all mint! He is one of the few superstars who truly took a personal interest in maintaining his tools of the trade, and in speaking with him, you could see the sincere love he has for his basses. I was so impressed with his kindness and humility, that I would have loved to own a piece of his legacy just on his personality, let alone his iconic importance to the musical psyche of the World. Truly a wonderful human being. It was an honor to be able to work on his favorite Alembic...#24.