1960 ( Definitive Stamps )
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1968-1972 ( Definitive Stamps )
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1978 ( Definitive Stamps )
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1984 ( Definitive Stamps )
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1984 ( Definitive Stamps )
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1989-1990 ( Definitive Stamps )
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1994 ( Definitive Stamps )
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1998 ( Definitive Stamps )
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2003 ( Definitive Stamps )
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