Rhodesia and Nyasaland pound British colonies. In the second half of 1964, Nyasaland became independent as Malawi, Northern Rhodesia became independent as Zambia, and Southern Rhodesia declared a name change to Rhodesia. Each issued their own pounds, at par with the Rhodesia and Nyasaland pound. See Malawian pound, Zambian pound and Rhodesian pound. The Federation also issued its own coinage. In 1955 a full new set of coins were issued with the Mary Gillick obverse of the Queen and various African animals on the reverse. The denominations followed those of sterling, namely halfpennies and pennies, which had a hole in them, threepences (known as
Northern Rhodesia these copper deposits could not be exploited commercially until the Southern Rhodesian railway had extended across the Zambezi and continued northward, to reach the Belgian Congo border, which it did in 1909. By that time, mining had started in Katanga, where rich copper oxide ores occurred near the surface. In Northern Rhodesia, the surface ores were of poorer quality, and copper was only worked intermittently at Bwana Mkubwa, until in 1924 rich copper sulphide ores were discovered about 100 feet below the surface. Prior to 1924, there had not been significant exploitation of Northern Rhodesia's mineral resources: there was some