This sharpening stone was likely manufactured in the late 1940's to 1950's in Littleton.In 1932 the NORTON Company purchased the PIKE Manufacturing Company and changed the name to Norton Pike Company. In 1946, ground was broken for a one story brick and steel factory building in Littleton, New Hampshite was completed and occupied in the next year.Emery carborundum stone for honing shaving razors, produced by Norton Pike Company USA after 1932. It is contained in a cardboard box with directions for use on the cover. On the left hand side of the cover are numbers: '4/9', '5/45' and lettering: EK, with a backward arrow underlined underneath and below that a 'H' shaving, barber tools, norton pike co, christenson harry