Efficiency Medal

The Efficiency Medal was instituted in 1930 for award to part-time warrant officers, non-commissioned officers and men after twelve years of efficient service on the active list of the Militia or the Territorial Army of the United Kingdom, or of the other Auxiliary Military Forces throughout the British Empire.  War and peacetime service in West Africa counted as double time.

At the same time a clasp was instituted for award to holders of the medal upon completion of further periods of six years of efficient service.