I recently acquired a Sasieni 8 Dot. It has a patent number, a model name, and "Sasieni" is in the old slanted script. I am a little concerned about the authenticity of the stem, though. It seems to have had a stinger sawed off, which seems to be legit, but one set of the dots isn't perfectly symmetrical. Is this a sign of a fake, or just a rare imperfection? I need the help of a more experienced collector to show me what to look for.