Good morning, I bought this coin last week on ebay. Even though grease filled die struck coins are not the most valuble of error coins. This one is special because error coins from the kingdom era are very scarce. And I have only managed to find two. And the collectors I know that have collected errors do not have any from that era. Here is the coin And to compare a 1922 version of the coin. This 10 aurar from the year 1922 is Icelands first coin minted. Siggi
That's a pretty serious filled die. Love the detail on the other side of it (which would be the reverse?).