Lot 121 : General - Imperial AirwaysGeneral - Imperial Airways : CAPE TOWN-LONDON 1ST REGULAR RETURN SERVICE Johannesburg-Nariobi, 4d Air joined pair & 2d of South Africa, tied with Johannesburg 27 Jan 32 registered cds cancels. On plain cover. Air Mail label top left. Johannesburg R cachet bottom left with manuscript Not Known RTS in red. Addressed to Butiaba. On the reverse Johannesburg 27 Jan 32 registered cds. Nairobi Registered oval 7 Feb 32 transit, Kampala Registered 8 Feb 32 transit, Ma(saka) 10 Feb 32 transit, Butiaba 11 Feb 32 receiving. Mombasa 20 Feb 32 registered for return. Nice cover with excellent postal markings.