This is an unfinished Olsen OK 155 pocket knife made in Seki, Japan between circa 1978-1982. In the late 1970s, Olsen teamed up with Seizo Imai to produce models in Japan and this was one of these knives. It features a stainless steel blade, sawcut bone handle, and nickle silver bolster. It is marked "Olsen Ok 155 - H.C., MI" (Howard City) on the front and on the back is "Stainless Steel Japan". This is a great medium sized pocket knife at 3.5" long closed. Highly collectible, yet usable. Acquired direct from the closed factory of Seizo Imai and in storage for nearly four decades, this is a rare chance to own unused old stock from a bygone era.