GREAT BRITAIN 1967 (MNH) 3D VIOLET CYLINDER 1 BLOCK, PERF TYPE A
3d Violet, type A head, gum arabic, centre phosphor band, bottom left corner cylinder 1 block x 6 with scarce type A perforation. Fresh and fine. Mint never hinged. Includes block with common type F(L) perforation for comparison. SG729; SGU8; SCMH5
Note: type A perforation features a single hole extending into the left margin of each row of perforations and none in the lower margin while type F(L) has no holes in the left margin but one extending into the lower margin of each column of perforations
