used 2a. vermilion, imperforate horizontal pair, used with "MOMBASA/A/OC 21/93" squared circle cancellations; fine. S.G. 6a, £550. Photo

Details
used 2a. vermilion, imperforate horizontal pair, used with "MOMBASA/A/OC 21/93" squared circle cancellations; fine. S.G. 6a, £550. Photo