The coin is found again.
I took it out The Albatros and wanted to place it in another geocache on a trip to Belgium. HOwever, at the time we started it got dark and we didn't succeed. On the trip to Ireland we couldn't find the cache either.
So... I will take it with me on my next trip and place it there. I't on its way to Germany, but... west, not east!
greetings ARthur and jelka.