Numismatikforum

Hello!
I have that coins, can you help me to identification - imitations or not?

Thank you !

1. Top at the left - Mainz Konrad II 1024-1039.
2. Top at the right - Speyer Otto II
3. Down at the left - Dortmund Konrad II 1024-1039
4. ?

4.Down at the right - imitation of Denver Konrad II pfennig, Dbg 566 ?