135116 1967 3D VIOLET PRE-DECIMAL MACHIN (SG729) CYLINDER '1' BLOCK OF EIGHT WITH DOUBLE STRIKE OF PERFORATION.

1967 3D VIOLET PRE-DECIMAL MACHIN (SG729) CYLINDER '1' BLOCK OF EIGHT WITH DOUBLE STRIKE OF PERFORATION. A fine unmounted og lower left corner marginal block of eight 1967 3d violet pre-decimal Machin (SG729) with cylinder number '1' and showing very fine EXTRA STRIKE OF PERFORATION which affects all stamps. Light bend on reverse but a very fine perforation variety. (Ref 135116).