This building was designed in 1938 by J.A. Moffatt & T.N. Duncan as the Johannesburg office of the Union Castle Mail Steamship Company Limited, founded in 1853 by Donald Currie whose name is associated with competitions in cricket and rugby. Until 1977 the Union Castle line had regular passenger and freight services between South Africa and England which also carried the mail.
93 Commissioner Street, Johannesburg
Photographs of the Union Castle Building (The Heritage Portal)