This is a National Security bulb filler called the Auto-Tank. I have yet to restore this one. It’s certainly a Langs product. The clip alone gives that away, but it’s not like their Auto-Vac bulb filler. In fact, it’s technically similar to a Platignum Visi-ink which is on my bench at present. I must strip these two pens down together for comparison and I hope to photograph the process.
Here’s the National Security Lion from the box. He never looks very fierce, this lion. On another box I had he had a big grin on his face. He’s also featured on a Lapis Lazuli ring-top I have, and he has a snout like a pig there. All in all, it’s hard to take him seriously. I’m pretty sure my cat could beat him up.