Unidentifiable Coin (Probably German)

Hello,
im back with another unidentifiable coin.
It was found with a metal detector in North Rhine-Westphalia, Germany
Its around 25mm in diameter and thin (around 1mm).
Unfortunately I ‎dont‎ have an accurate scale.

I know that its better when the pictures are cropped, can anyone recommend a program?

Its probably impossible to identify, but maybe anyone here is able to.
Thanks in advance

Verweis : "Wertinas"​​I know that its better when the pictures are cropped, can anyone recommend a program?​

I use PhotoScape


in which I brightened and cropped the pictures ...

Found this one myself: https://en.numista.com/catalogue/pieces201233.html
Could it be this one?
I took it into consideration because of the weird pattern in the middle of my coin.
I might need someone with more knowledge to verify it. The diameter would fit

ZacUK thanks for the recommendation! Photoscape is great! Will try to use it in the future