
Siberian coins were minted to alleviate a coin shortage in eastern Russia during the 1760's. Because the metal refining technology was not available so far out, there were trace amounts of silver and gold in the bronze which could not be removed from the copper. As a result this necessitated the coins having to be smaller in size to offset the difference in the intrinsic value compared with Russian coins minted in Sankt Peterburg or in Moskva. They were also given a distinctive design from their Russian cousins.
In 1782 the Kolyvan mint acquired more modern refining techniques and it was able to refine out the trace gold or silver in the copper, and the Siberian coin series was discontinued, and only regular Russian coins were manufactured after that time at that mint.
Siberian coins continued to circulate in Siberia, and in Russian American until the second quarter of the 19th century, after which time they dropped out of regular circulation.