Lot 53 : General - Imperial AirwaysGeneral - Imperial Airways : CAPE TOWN-LONDON 1ST REGULAR RETURN SERVICE Bulawayo-Broken Hill, 1d & 4d of S Rhodesia, tied with Bulawayo 28 Jan 32 cds cancel, On Robertson illust cover. First Official Air Mail cachet. Addressed to Broken Hill. On the reverse Broken Hill 4 Feb 32 receiving. Very fine clean cover.