Old copper (?) coin [solved]

Good evening,

I have another old coin, which I am not able to identity:

• 2.7 gramm
  
• 17.6 x 16.2 mm diameter
  
• not magnetic - probably copper
  

90°

Has anyone a clue what kind of coin this is? Origin, age, ...

Thanks a lot for your help!

I don't recognize it, but the serpent in the coat of arms is a symbol of the Visconti family (Milan), so that might be one place to look.

Edit: Yes, probably Milan, maybe with legend (MEDIO)LANI reverse around the shield. I don't see this obverse in the Numista listings, though. WIll try to get a look into CNI.

Very true - thanks.
I found this one:
https://en.numista.com/catalogue/pieces160165.html
which shows a very good fit.

I guess that's it! Thanks a lot for your help!