| Heading and notes: | Form number T.G. 42 which changed to T.X. 42 in 1968. Heading begins AUSTRALIAN POST OFFICE. | 
| Message area: | Blank. | 
| Reverse side: | Blank. | 
| Colours (text & form): | Green on yellow. | 
| Size of form overall: | 127 × 203 mm. | 
|  Printed in November 1964. | AA-DO-12A. Sydney to Lyndhurst, NSW Characteristics: 
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|  Printed in 1965. | AA-DO-12B. Wollongong to Berkeley, NSW. Characteristics: 
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|  Printed in 1973. | AA-DO-12Ca. Canberra for local delivery with Characteristics: 
 The 13th April was Gough Whitlam's last day of attending Parliament as a Member of the House of Representatives. He did not however resign from the House until 31 July 1978. | 
|  Printed in 1972. | AA-DO-12Cb. Unused delivery form. Characteristics: 
 Most of the 1972 printing was printed in the usual mid to dark green colour and on the usual yellow paper. The pale green variety was possibly a single printing. | 
Details of use and rarity.
| Form sub-number | Schedule number | Earliest recorded date | Rarity rating | 
| DO-12A | T.G 42. Sch.C9671 11/64. | 1 July 1966 at North Bowenfells (Relief No. 62). | All of these forms are rated R if in used condition. They are common unused. | 
| DO-12B | T.G. 42. Sch. C 1023-65 | 7 November 1967 at Berkeley, NSW. | |
| T.G. 42 Sch. C 1355-66 | |||
| T.G. 42 Sch. C. 5207-67 | |||
| DO-12Ca | T.X. 42 Sch. C5525/68. | 17 April 1970 at Telegraph Office Geelong. | |
| T.X. 42 Sch. C.6000/69 | |||
| T.X. 42. Sch. 6400/70. | |||
| T.X. 42 O/N C 4207/71. | 24 December 1974 at Bodalla, NSW. | ||
| T.X. 42 O/N C42581/72-L | 28 July 1976 at CTO Sydney. | ||
| T.X. 42 O/N C44561/73. | 30 June 1975 at Military P.O Balcombe. | ||
| DO-12Cb | T.X. 42 O/N C42581/72-L. | 27 March 1975 at Bodalla NSW. | NC |