

1881 |
December 13, 1881
|
Carnarvon, South Africa
|
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1912 |
May 14, 1912
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1913 |
October 18, 1913
|
Namibia
|
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1916 |
January 3, 1916
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1920 |
February 11, 1920
|
Ganaus, Namibia
|
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1928 |
January 17, 1928
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1932 |
March 27, 1932
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1934 |
June 20, 1934
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???? |