I think this is a situation of the glass being half empty or half full, it depends on how you look at it. I breath a sigh of relief when I find other examples stamped the same why mine is, that way if it is the work of "Bubba" then all the examples have been Bubba-fied!
Regarding this 3-4-9 stamp I am particularly excited because the existence of these other examples would argue against my barrel being a replacement with another pistol's serial number stamped on it. And instead, I believe what I have is an original all-matching, non-refurbished 1937 Tula which is precisely what I have been looking for these past few years!!!
Tim