Know what it is? OK, I’ll give you a hint:
Here it is, shown alongside its full-sized counterpart:
The clip gives this one away:
That’s right, this is an Autopoint pencil - the tough-to-find companion to the company’s “tab filler” pens of the early 1930s (see “While Most Pen Companies Dabbled in Pencils,” at http://leadheadpencils.blogspot.com/2012/07/while-most-pen-companies-dabbled-in.html). Who knew they made a ringtop?
Ordinarily, ringtop pens and pencils are worth something less than the side clip version - call it sexism or whatever, but there’s generally more demand for the big manly versions. I don’t think that holds true for this one, though.