I found this brown/gold striped pen with a uniqe ink window (to me) just a week ago on a online auction. My bid was based on that I thought it might be a Osmia pen. It's a beauty in my eyes but I haven't found any trace of imprint on barrel, clip, cap or blind cap. The pen is equipted with a 14 k nib and a lion head. From what I have found on this fantastic forum is that it could been made by Georg Peter Rupp, Heidelberg-Germany. Nib 14K - 585 Lionhead (logo) Triangle pointing left 58 (in a circle) Triangle pointing right Im adding a few photos and hope for some help to identify this NoName pen, by ink window, clip, cap, blind cap or nib. Best Regards Joakim