10 March 1920. Fifth type: a five-line overprint: BATUM BRITISH R. 15 R. OCCUPATION OBA. on an imperforate 1-kopeck stamp (orange-yellow); the later overprints were made in three colors: black, red, and violet (this color variety was additionally printed already in 1920). The red and violet overprints were made with water-soluble ink.
British Post in Batum was a postal service organized by the military administration of Great Britain during the occupation of the Georgian port of Batumi, which in 1918β1920 issued its own postage stamps.
At the beginning of World War I, Batum was part of the Russian Empire and was the administrative center of the Batum Oblast. In April 1918, troops of the Ottoman Empire entered the city, and on 15 December of the same year, after the defeat of the Central Powers, British troops arrived, remaining until July 1920.
From 27 November 1919 to 10 March 1920, various overprints of new denominations, the oblast name, and an indication of the British occupation were applied to the remaining stocks of Russian stamps from the 17th, 18th, and 21st issues.