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I found it discussed in this thread: https://twitter.com/kamilkazani/status/1513681957749596162 https://twitter.com/kamilkazani/status/1513681957749596162 Could

by eecc 4y ago

I found it discussed in this thread: https://twitter.com/kamilkazani/status/1513681957749596162 https://twitter.com/kamilkazani/status/1513681957749596162 Could be this WP but I'm not so sure: https://en.wikipedia.org/wiki/Monetary_reform_in_the_Soviet_Union,_1922–24#Dual-currency_system https://en.wikipedia.org/wiki/Monetary_reform_in_the_Soviet_...