Thanks for your reply Jon. I have reviewed the entirety of the ISMACS website and while there are pics of the "B" and New models I can't find a shred of info about the "A" model.
I am not expecting thousands for it but if it is something special I would rather sell it to a museum or antique dealer than some craigslist random. If it isn't rare I would welcome someone to prove me wrong!
No matter their name, anyone could enjoy this piece of history!