This is an elderly Post, but maybe I can identify this nib for you. This is a so called Redis nib, which was quite common in german speaking countrys. It was used for Schnurzugschrift, which means a very uniform lettering for technical drawings following DIN. With the uprise of plastics, ruling pens for technical drawings and Redis nibs for lettering were replaced by rotring isographs and plastic stencils.
This is an elderly Post, but maybe I can identify this nib for you. This is a so called Redis nib, which was quite common in german speaking countrys. It was used for Schnurzugschrift, which means a very uniform lettering for technical drawings following DIN. With the uprise of plastics, ruling pens for technical drawings and Redis nibs for lettering were replaced by rotring isographs and plastic stencils.
BTW: Like your work – it inspires me