Esterbrook made millions of their flagship 048 Falcon steel pen. It was their best-selling pen for over 70 years. They're still common, relatively inexpensive and generally dismissed by those seeking the "grail pens." (they don't fit in an oblique holder, for one, so calligraphers tend to not be interested)
They can vary in quality over the years, but even the worst, the most recent made (1940's) are still, in the end, a decent pen. They actually don't get the praise I think they deserve.
This one is from the late 20's, but even the later ones are relatively nice.
So, here's to the common, the plain, the ordinary Esterbrook 048 Falcon. Long may you be ignored by everyone but me.