What is "chervonets"

n. Any of several former currency of Russia: applied to various foreign gold coins prior to the reign of http://en.wikipedia.org/wiki/Peter%20I%20of%20Russia, then to a Russian gold coin of 1701-1757, and finally to a 1922 currency of the Soviet Union.

Chervonets (; plural chervontsy or chervontsev) is a former currency of the Russian Empire and Soviet Union. Originally a term for coins of purer alloy (the name derives from "червонное золото" ("chervonnoye zoloto") meaning pure gold,) the name was later applied to various sums in Russian rubles.