Got this one about a month ago, re-sac'd and ready to go, but I just can't write with it. Too small.
It's a Sheaffer Balance 350 (AKA Craftsman), and based on the research I've done, I think it's a '38/'39. It has the correct Sheaffer #3 nib, 14k, in an XF. While it's not pristine, it writes quite nicely, I think! There are two miniscule cracks, one on the cap lip, one on the barrel, and both are quite stable. Some brassing, but not horrendous. It'd make a nice user-grade.
I'm asking $35 shipped CONUS; Paypal cash transfer only, please.
FYI: 'Tis the pen on the left...Mrs. Angus' Balance is there for size reference only.

Here's a closeup of the cap/clip, showing most of the brassing.