1923, King George V, 1p rose red in right margin horizontal se-tenant pair with black Afrikaans and English overprints (1st setting) ''South West Africa.'', transposed lines of overprints with ''Africa.'' at top, black stroke in front of ''South'' on English stamp, full OG, previously hinged, VF, Est. $100-$150 (Image)

1927, vertical bilingual overprints in blue (setting IX, space between lines 16mm) ''South West Africa'' on South Africa se-tenant pairs of 2p-10s, complete set of six, full OG, NH, VF and scarce in premium quality, SG #49/54, £180 as hinged, Est. $200-$240 (Image)

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)