The Boker two blade equal end jack knife model #8842 has a fairly long history overall but a shorter one for this particular German made model. The #8842 was originally produced in the US in the 1940s and 1950s and looked slightly different than this one shown with a federal type shield and a few minor cosmetic differences, but in the same pattern and number. In the 1960s the #8842 was produced in Germany with German blade and shield markings. By the early 1970s the #8842 was again produced in America with USA markings and was discontinued in the mid 1970s.