3½d ultramarine GVI issue, a fine corner marginal block of six with '1' plate number in margin and an additional corner marginal block of four with '1648' sheet number handstamp in margin. Both blocks fine unmounted mint. (SG 133b)
3½d ultramarine GVI issue, a fine corner marginal block of six with '1' plate number in margin and an additional corner marginal block of four with '1648' sheet number handstamp in margin. Both blocks fine unmounted mint. (SG 133b)