J. B. Willems, steel pen nibs https://kallipos.de/j-b-willems-en.html
A collection of antique calligraphy steel pen nibs, produced by the manufacturer J. B. Willems from Bruxelles, Belgium
Berliner Schreibfeder-Fabrik (VEB) Blanzy-Conté-Gilbert Blanzy-Poure & Cie Brause