This object is a part of my collection of Swedish pattern coins. It is a 150 mm-85 mm copperplate with 4 obverse strikes of Charles the XIII Riksdaler paired on the other side with 4 obverse strikes of Charles the XIV Johans Riksdaler. There are also a few small mintmarks from the mintmaster. At this time Sweden was in the process of changing the way coins where made. The new technology of striking the coins surrounded by a ring was introduced in the late 1820ís. This copperplate is some kind of test-striking that normally would not leave the mint.
This copperplate is also interesting from a historical point of perspective. In 1818 Charles the XIV was crowned as a Swedish king. He belonged to the Bernadotte family and came from France. He was elected as successor to the Swedish throne since Karl the XIII did not have any child who could take over. Sweden's king today, Charles XVI Gustaf is a king from the same Dynasty, the Bernadottes. So this copperplate represents the historical transformation between the time before and after the Bernadottes.
There is one more similar copperplate known and that copperplate has two strikings. My comes from Gustaf Cavallis collection of copper coins.