Far Eastern Republic
|Arms stamps of Russia overprinted|
|2 kopecks green||2||20|
|other values 3k to 1 rouble||2-18||21-31|
The stamps of F.E.R. are complex both to list and to map across the catalogues. Fortunately, both Scott  and Gibbons  begin with what they refer to as the Vladivostock issue and the 2 kopek green.
F.E.R. was established as buffer between the Soviets and the Japanese, then in possession of Vladivostock. Russia annexed the area when Japan withdrew in 1922.
The map shown is used on StampNews, Dead Country and Big Blue and therefore deemed to be safely in the public domain.