@DadFather @penfount I have a very similar pen! It is a Moore (based in Boston MA) and the estimated date is also the 1920s. It is an eyedropper (no rubber sac) and there is no hole in the cap.

When I bought it, the nib was too sharp and tore up paper. I buffed it out on the bottom of a coffee mug and it works great (though it’s a bit of a gusher). I put a daub of silicon grease on the threads and the ink inside is currently three or four years old and still wet.

#fountainpen #antique #antiques