PAKISTAN 1949-53 6a blue 'Karachi Port Trust' Proof, SG48Pakistan 1949 53 6a blue 'Karachi Port Trust', type 15a (crescent moon with points to left), IMPERFORATE block of 12 (6x2) form lower left corner of sheet (10x8 format) with plate number '1' and printers, De La Rue imprint, SG48. A fine unmounted mint corner block with full original gum. Some gum creasing and small marginal faults, but remains very attractive quality. An important multiple and unique in this form. BUY NOW: Order online, by phone +44