136979 1969 4D CHRISTMAS (SG812) LOWER RIGHT CORNER BLOCK OF EIGHT WITH FOUR STAMPS 'DOUBLE PERFORATION'.

1969 4D CHRISTMAS (SG812) LOWER RIGHT CORNER BLOCK OF EIGHT WITH FOUR STAMPS 'DOUBLE PERFORATION'. A fine unmounted o.g. lower right corner marginal traffic light block of eight with lower four stamps unusual error DOUBLE PERFORATION. Also unmounted o.g. lower left corner marginal cylinder number block of eight with EXTRA PERFORATION IN LEFT SHEET MARGIN. (2 items). (Ref 136979).