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GB.GEORGE VI - CYLINDER CONTROL BLOCKS fine mint (many blocks never hinged) collection featuring different cylinder control corner blocks of six. With 1937 Coronation 1½d (4 different), 1937-39 definitives to 7d, 1940 Stamp Centenary set (less 2½d), 1941-42 definitives to 3d, etc. Also some additional singles, strips and blocks of four all showing marginal controls / cylinder numbers. Fresh and attractive. (approx 475 stamps including 57 blocks of six)