Great Britain and British Commonwealth South West Africa Air Post stamps
Sale No: 94
Lot No:699
Symbol:**
Cat No:Sc. # C3b
Air Post stamps. 1930, inverted overprint (large letters) ''S.W.A.'' on South Africa Biplane 4p green, bottom margin single, full OG, NH, F/VF, S. Sismondo certificate, SG #72b, £200++, Est. $250-$300 (Image)