Probably german state coin with letter P above three shields and on other side a letter N.

This coin has a diameter of 23 mm. It looks like silver.
Arrangement of shields and the letter "P" is like I saw in
https://en.numista.com/catalogue/pieces142972.html
1/2 shilling Pfalz-Oberpfalz 1500-1508
And more Pfalz coins like:
https://en.numista.com/catalogue/pieces188203.html
https://en.numista.com/catalogue/pieces173557.html

But the shields look more like the following, that is a checkered shield, a shiled with a lion
and a shield with another animal :
https://en.numista.com/catalogue/pieces239003.html
1 shilling Duchy of Pfalz-Zweibrucken , 1490

On the other side is a capital "N". Around the letter "N" I can see letters like ": BRE." and "AV.GR.", although I am not completely sure. And the N could , if turned 90 degrees be read as a "Z", but since I expect coinage struck it should be read as an "N".
I have explored on internet a lot, but I could not find a description or image of a similar coin with a capital "N" on it.

Who recognizes this coin?

I agree that the side with the shields looks like Pfalz-Zweibrucken.  There is a Bavarian shield and two shields with lions facing two different directions.

I also could not find an example of this coin on sites like acsearch.  The lettering reverse would suggest much later than the c. 1500 coins in your links.

Dear tdziemia,

I will look at later coins as you suggested.
I also wondered if the "N" had something to do with a city like Nurnberg or with a person like "Napoleon".
The latter is of course not the best example, but in Belgium there were coins struck with a capital "N" for him.

Thanks for your reply!

Katja