Lot 50216 – 1964 Geographical Congress 4d with variety violet omitted (face value) in mint n.h. lower right traffic light corner block of four

1964 Geographical Congress 4d with variety violet omitted (face value) in mint n.h. lower right traffic light corner block of four, small wrinkle at the top of the lower left stamp otherwise fine, very rare positional multiple with only a marginal traffic light pair recorded otherwise, incl. matching normal traffic light block (S.G. £900 as singles).