Hello all, So this is my first post. I bought a pen from Amazon's discount site, MyHabit, almost a full year ago now. I tried to find the correct cartridge for this pen. I tried two or three different cartridges to no avail back then. I gave up and frankly do not remember what cartridges I tried. The little empty sleeve that came inside the pen says "Lady Austria" on it. And MyHabit listed it as a Montegrappa pen, but it does not particular look similar to anything in their line from what I can tell. It should be noted that I am very new to fountain pens. The pen in question is my first purchase and I gave up for awhile after this. But I ended up buying a Lamy Safari with a Z24 converter and Waterman Intense Black ink at the end of this past January and I like it. So thought I should see if anyone knew the ink cartridge or converter for this "Teorema Lacca Boreaux" pen.