This is a factory sample prototype folding pocket knife made circa 1970s by Seizo Imai for Madonna. Madonna was a sub-brand of Puma and difficult to find in the USA. It still has the factory sample stickers on it. Seizo Imai was one Seki, Japan's finest craftsmen and most famous knifemakers of the modern era. His collaboration with Parker spanned nearly two decades. He made knives for Parker, Frost, Browning, Explorer, Compass, Condor, and many others, including his own brands Imax and Seizo Imai. His custom Loveless style knives are works of art. After his passing, several vintage old stock models were found at his warehouse. This is one of these rare finds.