Air Mail unused Block of Four 1931 (8 June) Air ½d. to £1 each in a marginal block of four with part imprint, fine mint. S.G. 137-149, £800

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Air Mail unused Block of Four 1931 (8 June) Air ½d. to £1 each in a marginal block of four with part imprint, fine mint. S.G. 137-149, £800