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The roll is modelled on the original Roll of Distinguished Philatelists established in Great Britain in 1921, and the first signatory to the South African roll was Gilbert J. Allis in 1932. Election to the roll is by a vote at the PFSA congress. Signatories include Robson Lowe, Adrian Albert Jurgens and Harvey Pirie.
Denominations included 1 ⁄ 2, 1, 2, 5, 10, 20 and 50 cents. Silver was replaced in coins by nickel. Initially the coinage bore the portrait of Van Riebeeck, and later the State Presidents of South Africa (except F.W. de Klerk) or the South African coat of arms. The country name was given in Afrikaans, English or both.
Copper is one of the world's most important industrial minerals, and Africa is an important world producer. While output is traditionally dominated by Zambia, South Africa and Katanga Province in the south of the Democratic Republic of the Congo, many African nations contribute to copper production, and many African nations have undeveloped ore resources.
Palabora Mining Company Limited (founded August 1956) is a publicly traded mining company headquartered in Phalaborwa, Limpopo province, South Africa. The company operates a single cluster of open-pit and underground mines producing mainly copper as well as byproducts such as precious metals from anode slimes, nickel sulfate, sulfuric acid, magnetite, and vermiculite.
Copper Resources Corporation is a subsidiary of Metorex. As of November 2011 it held a 92.5% interest in the Hinoba-an Porphyry Copper project in the Philippines, and a 75% interest in Miniere de Musoshi et Kinsenda (MMK). [6] MMK, formerly a subsidiary of Forrest Group, owned the flooded Kinsenda and Musoshi copper mines in the Katanga Province.
Half dollars struck from 1965 to 1969 for circulation and in 1970 for collectors also incorporated cladding, albeit in the case of those coins, the core was a mixture of 20.9% silver and 79.1% copper, and its clad layer was 80% silver and 20% copper. Half dollars struck since 1971 are produced identically to the dimes and quarters.