This is all I could find on it. May be the same site you got your picture from.
"New machine stamps, featuring a polar bear, were issued 1 April 2006. These can be purchased on several post offices equipped with franking machines. The selected value is printed on the machine stamps, when purchased.
For the Philatelic Service to be able to offer machine stamps like these to collectors, there are three pre-printed values available; 6.50 – 8.50 – 10.50, and these are known as franking labels.
When the image featured on the machine stamps/ franking labels is changed, first day covers with the new image are issued."
http://www.posten.no/Portal/English...g+labels.htm Steve


