Swedish penning
The penning or penny was first minted in Nordic countries by the Norwegian king Olaf Tryggvason in the years 995-1000 in the image of Anglo-Saxon coinage. Swedish variants was minted from about 1150 until 1548, and remained a unit of account in Sweden until 1777.
The penning was minted in imitation of the pennies, pfennig and deniers issued elsewhere in Europe. However, although based on these coins, the accounting system was distinct, with different systems operating in different regions. All used the öre (derived from the Latin aureus) which was worth 1/8 of a mark or 3 örtugar. However in Svealand, one öre was worth 24 penningar, but in Götaland it was worth 48 penningar and 36 in roughly the Diocese of Linköping and on Gotland. Around 1300, by royal command, the Svealand standard became the national standard, except on Gotland. The örtug was first minted around 1370 and the öre was issued as a coin from 1522. In 1524, however, the real örtug was replaced in minted form with a new one, also known as halvöre (half öre), which had a little higher value (whereas one mark was divided into 24 örtugar, it was divided into 16 halvöre), but the old örtug remained as a counting unit until 1777.