So I never looked into it closely, but I knew that the 3 and 15 kopeck coins had names of their own of Tatar origin, so it had to have had a long history. Acco

So I never looked into it closely, but I knew that the 3 and 15 kopeck coins had names of their own of Tatar origin, so it had to have had a long history. According to wikipedia [1,2,3], as a physical coin it was minted periodically throughout Russian history. The Tatar origin of its informal historical name is either 'gold'[4] or 'six'[5]. It was last introduced in 1839-1841 and persisted into Soviet period, until 1991 when it was discontinued by the newly independent Russia. The 1/2/3/5 weight system had to be of the Soviet design, since the metric system was adopted following the Bolshevik revolution, but the weights and dimensions haven't changed since 1926 [6]. [1] https://en.wikipedia.org/wiki/Ruble#Russia's_coins https://en.wikipedia.org/wiki/Ruble#Russia's_coins [2] https://ru.wikipedia.org/wiki/%D0%A2%D1%80%D0%B8_%D0%BA%D0%BE%D0%BF%D0%B5%D0%B9%D0%BA%D0%B8 https://ru.wikipedia.org/wiki/%D0%A2%D1%80%D0%B8_%D0%BA%D0%B... [3] https://ru.wikipedia.org/wiki/%D0%90%D0%BB%D1%82%D1%8B%D0%BD_(%D0%B4%D0%B5%D0%BD%D0%B5%D0%B6%D0%BD%D0%B0%D1%8F_%D0%B5%D0%B4%D0%B8%D0%BD%D0%B8%D1%86%D0%B0) https://ru.wikipedia.org/wiki/%D0%90%D0%BB%D1%82%D1%8B%D0%BD... [4] https://en.wiktionary.org/wiki/%D0%B0%D0%BB%D1%82%D1%8B%D0%BD https://en.wiktionary.org/wiki/%D0%B0%D0%BB%D1%82%D1%8B%D0%B... [5] https://en.wiktionary.org/wiki/%D0%B0%D0%BB%D1%82%D1%8B https://en.wiktionary.org/wiki/%D0%B0%D0%BB%D1%82%D1%8B [6] https://en.wikipedia.org/wiki/Soviet_ruble#Coins,_1924%E2%80%931961 https://en.wikipedia.org/wiki/Soviet_ruble#Coins,_1924%E2%80...