I agree that this is a obvious Johnson. I think only a very few would qualify as a possible Heiser. I'm busy this week and next but if this thread is still alive I will try to get some more examples of possible Heiser's with the Randall stamp. I'll also look for some SS stamped knives and see if I have any Heiser's with those. That would date it at 1963. I don't think so but I'll look.
So with Mike's knife and potentially others that would date Johnsons involvement before 1962 I think it is safe to say that he was on the scene before traditional thinking had it.

Gary