Description
1967 3D MACHIN (SG729) CYLINDER BLOCK NO.1 WITH DOUBLE STRIKE OF PERFORATION. A fine unmounted o.g. cylinder block of six 1967 3d Machin violet (one phosphor band)(SG729) variety DOUBLE STRIKE OF PERFORATION which affects all stamps, one stamp with paper wrinkle. Unusual and scarce variety. (Ref 117805).
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