This is an original Olsen OK 157 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, bone handle, and nickle silver bolsters. It is marked "Olsen Ok 157 - H.C., MI" (Howard City) on the front and on the back is "Stainless Steel Japan". This is a great vintage clasp at 4.25" 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.