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The eight members of the GSL class entered service on the TR between 1929 and 1931. They were operated by the TR until it was succeeded by the East African Railways (EAR) in 1948. They then served with the EAR until the mid 1950s.
Patience, Kevin (1976), Steam in East Africa: a pictorial history of the railways in East Africa, 1893-1976, Nairobi: Heinemann Educational Books (E.A.) Ltd, OCLC3781370, WikidataQ111363477