After George VI ascended the throne, the new series of 12 values used three pictorial designs; a Berbera blackhead sheep, Greater Kudu antelope, and a map. The 1938 series included a 3/4 portrait of the king; in 1942, with the restoration of civil postal service, new stamps used a full-face portrait, and the sheep design was re-engraved.
Around 1950 the currency changed from annas and rupees to cents and shillings, and the 1942 stamps were appropriately surcharged. Ironically, the UPU 75th anniversary issue was printed in cents and shillings, but its issue date was 10 October 1949, before the changeover, so those stamps had to be surcharged in the old currency.
Queen Elizabeth II ushered in a new series featuring a variety of local wildlife and scenes. Some values of these stamps were overprinted 21 May 1957 with "OPENING / OF THE / LEGISLATIVE / COUNCIL / 1957", and on 5 April 1960 with "LEGISLATIVE / COUNCIL / UNOFFICIAL / MAJORITY, / 1960" to mark the events as named by the overprints.