GREAT BRITAIN 1967 (MNH) 3D VIOLET CYLINDER 1. BLOCK, GUM ARABIC, PERF TYPE A
3d Violet cylinder 1. block x 6 with type A head, gum arabic, centre phosphor band, and scarce type A perforation. Fresh and fine. Mint never hinged. 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 a single hole extending into the lower margin of each column of perforations
