Addition of Vereinigte Deutsche Nickelwerke (Schwerte, Germany)

Source: https://en.numista.com/catalogue/pieces3225.html

This is already in the database:
Vereinigte Deutsche Nickelwerke, Düsseldorf, Germany (1873-2005)

Where does the info that this was actually in Schwert come from?

I have no idea, it says it in the year lines.

Απόσπασμα: "CoinCollector1243"​I have no idea, it says it in the year lines.

​I'm not following your reasoning, you take numista to proove yout modification to numista? That's a very nice scientific approach. Are all your demands like that?

There seems to be some confusion with another company:
https://www.deutsche-nickel.de/unternehmen/
Deutsche Nickel, founded 150 years ago in Schwerte.
But I don't think this was a mint.

So I think the VDN in Dusseldorf is correct.

Unless you have some other reference?

Best