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Proof 1894 "AFRICA" 2½d. colour trials (8) in dull purple, green and carmine, green and orange, and in green and violet, each matched on coated and uncoated paper, all are marginal

细节
Proof 1894 "AFRICA" 2½d. colour trials (8) in dull purple, green and carmine, green and orange, and in green and violet, each matched on coated and uncoated paper, all are marginal