This is a factory sample prototype folding knife from circa 1970s by Gesco Cutlery based in the USA and branded Rhino and made in Seki, Japan by Seizo Imai. It still has the factory sample stickeSeizo 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.