| Heading and notes: | Form number E.T. No. 1. Standard 2 line interim heading with TELEGRAM above heading. |
| Message area: | Lined (6A) or blank (6B). |
| Reverse side: | Blank. |
| Colours (text & form): | Blue or black on buff. |
| Size of form overall: | 194 × 224 mm. |
| Size of datestamp box: | 26 × 28 mm. |
Details of use and rarity.
| Form sub-number |
Schedule number | Earliest recorded date | Rarity rating |
| DO-6A | 600000 - 21.8.17 66 | 21 June 1918 at Wallaroo. | RR |
| DO-6B | 1000000 - 18.12.15 3002 | 24 November 1916 at Adelaide. | R |
| 500000 - 12.9.16 409 | 31 March 1917 at Adelaide. | R |