My bet is that the Kenya civil service would be using hand me down Brit office equipment similar to that used elsewhere in the Empah in the 40’s and 50’s.
If I were to attempt a critical analysis of the document, I’d start with the known typefaces of machines in use in
the Indian Civil Service, the East Africa civil service, and possible the South Africa/Northern Rhodesia-Nyasaland Civil Service.
No way would they have the latest office equipment, and typewriters can last for ages.