Proof  1899 "Imperium" 6d. colour trial, a vertical pair in purple and green - with solid and white numerals, on buff paper with reversed Crown CA watermark. Photo
Proof 1899 "Imperium" 6d. colour trial, a vertical pair in purple and green - with solid and white numerals, on buff paper with reversed Crown CA watermark. Photo

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Proof 1899 "Imperium" 6d. colour trial, a vertical pair in purple and green - with solid and white numerals, on buff paper with reversed Crown CA watermark. Photo