Whew! Glad I found this thread again...I wanted to check my own collection of Sheaffer "No Nonsense" pens (I'll use the abbreviation "NN"

) before I replied....
Since I bought almost all of my NN pens from other people, I can't really say when they were all made...
but I can say that my first NN fountain pen, solid red in colour (which I bought new in 1976/1977 at a department store) does *not* have the horseshoe-shaped landing on the barrel end. None of the other
solid coloured NNs I own have the landing, either.
I have several of the "Viewpoint" NN models---the older ones *without* the rubber sections---and they all
have the horseshoe-shaped landing.
I also have a few NN "Vintage" fountain pens and they too all have that raised horse-shaped imprint.
From the article on Penhero.com, it appears that the "Vintage" models came after the solid-coloured original NNs... so perhaps that horse-shaped "landing" is of more recent origin?
It does look a lot like the current Sheaffer logo (
http://sheaffer.com/cover/logo_circle.jpg ), doesn't it?
Recently, I acquired a solid orange NN and a solid tan NN (no white dots on either) fountain pen, and both were missing the "Sheaffer" from their clips. I thought I had bought a couple of knockoffs, but then I spotted the words "SHEAFFER-MADE IN USA" on the barrels of the pens, written around the body of the pen, next to the barrel threads.