Great Britain 1967-70 Machin 4d sepia (centre bands) cylinder block of 6 (Cyl 12 no dot) unmounted mint
Great Britain 1967-70 Machin 4d sepia (centre bands) cylinder block of 6 (Cyl 12 no dot) unmounted mint
Great Britain 1967-70 Machin 4d sepia (centre bands) cylinder block of 6 (Cyl 12 no dot) unmounted mint