Here's a quote from a relevant article:
Quote:
To conclude, I should add that the Greišslumerki stamps are Revenue stamps, and were created for the payment of a flat fee on receipts of payment for amounts greater than 20 aurar, starting in 1935 and ending in 1941. This included Money Orders. Remainders of 65 aurar and 75 aurar Gullfoss stamps of 1932 were overprinted for this use, until specific Greišslumerki stamps were definitively issued in 1936. They are Cinderellas, therefore, but might be of interest to readers.
http://www.nfvskandinavie.com/resou...and_mag5.pdf