Black Rappen fountain pen from the early 1930s. Piston ink filler with transparent ink vindow. The piston moves back and forth when the bottom screw is activated, but it cannot absorb ink, which is why it must be restored before it can function as a fountain pen again. The clip is unoriginal, otherwise only original parts are seen on this rare fountain pen, produced by Pelikan in Germany, which the fountain pen's design actually reveals. L. 11.2 cm