These are from the Russia West army under general Awaloff-Bermondt, but they didn't come into postal use.
Count Paul Mikhailovitch Awaloff-Bermondt was a White Russian adventurer who sought, under the German Polish General Rüdiger von der Goltz, to create a German controlled Latvia and to restore a Russian Czar in the Baltic Provinces, in 1919. Defeated, he fled to Denmark.
http://en.wikipedia.org/wiki/Pavel_Bermondt-Avalov