Sheaffer Matchstick Filler (?) Desk Pen - How Does The Filler Work?

January 18, 2020

I have recently acquired a Sheaffer desk pen, it doesn't have any particular marking on it, but it has a Feather Touch #5 nib. The section has a sac nipple, and there is a metal sac protector that snaps on. It seems to take a #15 sac. The barrel just has the usual Sheaffer inscription. The sac protector is solid except for 2 holes on opposite sides near the open end; there is nothing inside the holes except the sac, once it's installed..There is also a somewhat larger hole at the end opposite the open end.

How does one ink a pen with this configuration? Should I press a matchstick through the larger hole on the end? That seems slightly weird to me, but I'll give it a try if that's what is supposed to happen. Suggestions for substitutes for a matchstick for this purpose are also welcome.

Possibly unrelated, there was some corrosion on the outside of the sac protector, some on the inside near the open end, and on the inside of the barrel. I have done my best to clean it off, but I'm guessing it means that ink was leaking. I've put a new sac on, so maybe that resolves that; I mention it only in case it affects the above questions.

January 18, 2020

Photos would help, but could this be a Touchdown or Snorkel that's lost some of it's guts? Such a desk pen would have a blind cap integrated in the plume if I remember correctly, and would fill by a mixture of sorcery and compressed air. Sorry you Snork fans, not my fave filling system