Since I just purchased a 1953 Greenland specimen set, I started researching it abit more..and stumbled onto this:
http://www.seaside88.com/banknotes/...anknotes.htm"Dutch Administration"? Any world currency expert would know Greenland was under Danish Admin. Or you don't even have to be a currency expert, sufficient knowledge of 20th century european history suits just as fine...
How these errors occur is beyond me...