Can someone help me to identify the fountain pen in the photo? The hands are from Edmund Husserl, the founder of Phenomenology. I don't know exactly the year of the photo, but it could be from 1920 - 1938 (the year of his death). The friend who posted it in Facebook works in the Husserl Archives (Leuven), and says it is a pen with an ink reservoir (not a dip pen). Curiously, he appears to be using it with the nib upside down, surely to get a finer stroke.