Kaweco Sport fountain pen:
Thanks to Thomas Dirk from Merz b. Schwanen who brought my attention to this great pen, while having lunch together at the Frontküche. Later that day, I found the Kaweco Sport fountain pen @ Manufactum in Munich. Kaweco produces these pens for Manufactum based on the design from 1935. With only 10,5 cm long, a good addition to your EDC. For a very detailed review for this pen check this site.