1895-96 Watermark Crown over SA Perf 13 1d Green and 2d Orange used on 1897 (13 Apr) 'On Public Service Only' envelope from Adelaide to London inscribed 'Federal Convention/1897/(S.A.)' at lower left, also printed on back flap, fine
1897 (22 Nov) OPSO printed cover with coat-of-arms on flap, used to Broken Hill and franked with 2d orange opt 'O.S.' (2) tied by 'EXPRESS RAILWAYU' datestamps, arrival backstamp, minor Blemishes
1910 (14 Mar) use of OHMS registration envelope for Education Department used from Adelaide franked with Tannenburg 5d Dull Purple punctured 'SA' tied by Registered Adelaide cds, Thebarton squared circle arrival backstamp