German East Africa was a territory comprising present-day Tanganyika, Rwanda & Burundi. A small part of northern Mozambique, the Kionga Triangle was also part of it. The Deutsche Ostafrikanische Gesellschaft or German East African Company established the colony in 1885. When Sultan Bargash of Zanzibar protested, Chancellor Bismarck sent 5 warships to bomb the sultan's palace. The Swahili Coast was divided between the Germans and British, with the latter gaining control of Mombasa, which would later become Kenya.
The Germans made Tanganyika a state-run colony in 1891, and put large efforts in developing the economy, but it never yielded a profit despite gold mines found at Sekenke in 1907. What the Germans did very well is organising elementary education for all locals, unmatched in any other African colony. The Swahili word for school is Shule derived from German Schule.
During WW1 the British and Belgians invaded and annexed German East Africa, after which the League of Nations mandates of Ruanda-Urundi (Belgium) and Tanganyika (Britain) were established.
German East Africa used the German East African Rupie, which was at par with the Indian Rupee and subdivided in 64 Pysa. In 1904, it was decimalised into 100 Heller and a new exchange rate was established at 15 Rupien = 20 German Mark. As 20.4 Mark was equal to Pound Sterling, this set the Rupie to approx 1s4d, less than the Indian Rupee's value of 1s6d.
During WW1 the Germans minted emergency issues, amongst others a gold 15 Rupien coin which was used to pay the soldiers.
German East African Rupie coins are very beautiful if you manage to find one. They sell at around 35 EUR for a VF.
The Rupie was replaced by the East African Florin in 1920 at par, which meant a revaluation of close to 50%.
https://en.numista.com/catalogue/afrique_orientale_allemande-1.html






