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CoinOfNote

The Denga, a coin from Russia, issued since at least the mid 14th century. In 1535, was the first country to go with the Denga worth 1/100 Rubles. I found an argument that they continued to also use non-decimal until after 1800 but I can't find references for that? Any help? Meanwhile, here is a Denga from 1749, issued under Elizaveta Petrovna. More at: coinofnote.com/russia-1-denga-