unused -- 1929-31 2a. mint vertical pair, one showing inverted "S", 1933-38 3a. mint pairs (2) and 1949 3a. 4p. unused marginal block of four. S.G. O28/28a, 40, 99; £310

Details
unused -- 1929-31 2a. mint vertical pair, one showing inverted "S", 1933-38 3a. mint pairs (2) and 1949 3a. 4p. unused marginal block of four. S.G. O28/28a, 40, 99; £310