Cover franked with single 1939 20c blue (SG 677) tied by (C) POSADAS M.I. cds dated 6 JUL 1940. Addressed to BENGUELA, PORTUGUESE OCIDENTAL AFRICA (Angola). Censored in transit in South Africa with printed red on white censor strip tied on reverse by LUANDA transit cds with BENGUELA arrival cds alongside. A very unusual destination.