Mongolia

The tögrög or tugrik is the official currency of Mongolia. It was historically subdivided into 100 möngö (мөнгө / ᠮᠥᠩᠭᠦ).
The word tögrög (төгрөг) refers to “circle”, or a “circular object” (i.e. a coin). Today, it is rarely used outside of referring to the currency, with the exception of the phrase tögrög sar (төгрөг сар), meaning “full moon”.
The tögrög was introduced on December 9, 1925 at a value equal to one Soviet ruble, where one ruble or tögrög was equal to 18 grams (0.58 ozt) of silver. It replaced the Mongolian dollar and other currencies and became the sole legal currency on April 1, 1928.
Möngö coins are no longer in circulation as currency, owing to their negligible value. Today, they are sold online and to tourists as collectibles.