unused Block of Four -- 1a. block of four and 2a. marginal block of four (split into two vertical pairs and rejoined), fine mint. S.G. J19b, J20; £780

Details
unused Block of Four -- 1a. block of four and 2a. marginal block of four (split into two vertical pairs and rejoined), fine mint. S.G. J19b, J20; £780