I would call them Mules because the wrong reverse die was accidentally used on one side of the coin.
But I do respect what Idolenz is saying. They have used a wrong reverse die from a previous or next design on the same coin.
I did know about the German 2008 2 Euro Bundesländer - "Hamburg" Mule because I have got one and I created the page for it.
This coin does actually have its own KM# A261 and is definitely a Mule as the Obverse design was never used on any other year.
I was aware of the the Portugese 2008 1 Euro Mule where they used the Old Map when they should have used the New Map.
I believe it should have its own page.
I wasn't aware of the Finland 2006 2 Euro Mule where they used the New Map a year before they were supposed to.
Thanks for alerting me to it.
I was aware of the Germany 2007F 20 Cent where they used the Old Map when they should have used the New Map.
I believe it should have its own page.
The pages for the 2 Mule coins that are not listed can be easily created.
Cheers Mike
Master Referee - See my profile for what I collect.