This is an unmarked handmade prototype made in Seki, Japan by Seizo Imai circa 1980s for Parker. Comes with black leather sheath, the strap that goes over the handle has shrunk a little and although it probably can snap shut we have not done so in order to prevent damaging the handle. 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.