@chro, it looks to me like this coin has been encased. I can see the extra rim around 5 Pfennig side. You are looking at the bottom of the case, which covers the flip side of the coin in your second pic. I suspect that if you weigh it, it should come back heavy.
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz