unmounted mint Block Larger Than four 1963 2c. green, three blocks of twenty (2x10) with margins at top and foot, the first normal, the second with overprint misplaced to top and with the upper pair grossly misplaced in comparison with the remainder, the third with the upper pair variety overprint omitted, fine unmounted mint. A rare and most unusual trio. S.G. O209a, £1,200