>Over the years many countries experimented with 3-unit coins or banknotes. For instance, in the 90s, Ukraine had a 3 karbovanets banknote and Uzbekistan had a 3 som banknote
I think "experimented" is the wrong word here when Uzbekistan and Ukraine paid with 3 kopeck coins and 3 ruble banknotes for decades before that.
I think "experimented" is the wrong word here when Uzbekistan and Ukraine paid with 3 kopeck coins and 3 ruble banknotes for decades before that.