ask for help

It was a piece of copper of the same design and size as some kind of German silver coin, but it had the same design on both sides, one concave and one convex, and I wondered what it was used for. I also want to know about another copper coin, which has some extremely small writing on it that is difficult to read, and it has a strange date marking

The lines circled confusing dates and tiny handwriting, and what should have been a number on the date was replaced by a cross

the other coin looks like this one

N#90442

A one sided replica of the following. It's purpose? Unknown.

N#331700

oops-all-pfennig

the other coin looks like this one

 

N#90442

 

 

thank you so much