Proof Block Larger Than four 6d. dull purple and black, the issued stamp in a special mint miniature sheet block of twelve (6x2) with margins all round, prepared to test the possibility of removing a written cancellation by means of neutral potassium chlorate, fine. Photo | Christie's

拍品 603

603

Proof Block Larger Than four 6d. dull purple and black, the issued stamp in a special mint miniature sheet block of twelve (6x2) with margins all round, prepared to test the possibility of removing a written cancellation by means of neutral potassium chlorate, fine. Photo

Cancellation Removal Trial

Proof Block Larger Than four 6d. dull purple and black, the issued stamp in a special mint miniature sheet block of twelve (6x2) with margins all round, prepared to test the possibility of removing a written cancellation by means of neutral potassium chlorate, fine. Photo

細節

Proof Block Larger Than four 6d. dull purple and black, the issued stamp in a special mint miniature sheet block of twelve (6x2) with margins all round, prepared to test the possibility of removing a written cancellation by means of neutral potassium chlorate, fine. Photo

來源

De La Rue archives, 1976