Whenever you asked about a vintage pen, especially from brands that are not well-known, always attach a photo or two, that will help anyone to help you.
Weidlich, just like the other pen makers back then, produced a lot of variety of pens, because they have to follow what's trending. So it's impossible to just mention the name Weidlich, and suddenly everyone knows which pen you're talking about.
For example, here's a Weidlich (among several that I have restored through out the years):
https://live.staticflickr.com/4855/4...90b6b19d_c.jpg
But I have also a Weidlich that are black hard rubber like those made in the 1910's.