Snubbing all the elitist philatelists
with all their money, it is somehow significant to understand
both "most valuable stamps" in the world were once owned
by mere schoolboys.
There is a great message there.
The postmark is Nya Kopparberget 13th July 1857
Now known as Kopparberg Sweden
http://en.wikipedia.org/wiki/Kopparberghttp://en.wikipedia.org/wiki/Treskilling_Yellow