You are spot on (again) Chalky, it was Pat Brady who found/had a box of only 50 copies. That plus the maybe three /four copies that cropped up via ebay over the years and the one Lew Stanley once had (who again told me BEFORE he had that one copy he never ever had one, not even seen one...), thats about it quantitywise. I had two and sold them both at 600 UKP. Wouldn`t mind one back but will wait until the price drops (wishful thinking, eh ?)
Marc