If the big lumps in my noggin are accurate, the company was founded in 1959 and started in Melvin's (I think that was his name) garage on Logan Avenue in Waterloo... I think there was an intermediate location, between the garage and the current facility, but not 100% sure of dates or location.
Besides the nice colored handle offerings (red, blue, orange, and black), I have a fairly porous mold (passed on from Dad's collection) with original stained walnut handles... Lloyd said it is from pre-1973 but couldn't get anymore accurate than that because they did not start putting dates on the molds until that time (which would seem as if it should be a facility/location change as well).