Great idea for a thread; thanks for starting it. I'm pretty sure I have one of those around here somewhere.
Yup, here it is...
K101707, shipped January 1951 and thus a fairly early specimen of the design (though I'm not ignoring the fact that several were shipped in second half of 1950). I acquired this one from a fellow SoCal forum member a few years ago.
I don't shoot this one anywhere near as much as I ought to. Now that I have reminded myself it is in the safe, I need to get it to the range.