PITCAIRN ISLANDS 1965 1d ICY reddish purple and turquoise-green variety, SG51aPitcairn Islands 1965 1d "International Co operation Year" reddish purple and turquoise green, variety 'TRISTAN DA CUNHA' offset on reverse in reddish purple, SG51a. A Post Office fresh unmounted mint example with full original gum. A rare and remarkable item. The variety was caused by the back of one sheet of stamps coming into contact with the blanket plate used for applying the Tristan da Cunha inscription to the same basic design. BUY NOW: Order