Joe, Ron and Tune: Very interesting thread. Started me thinking and looking at similar knives. On the attached photo I tried to pick several brown button model 1's from the same general era. I always thought it was a given that if the sheath was marked with Randall on the back it was a Johnson. Now, after looking at these I'm not so sure. See if you can guess what sheath is a Heiser, what is a Johnson and what is the bottom sheath?