| Heading and notes: | Form No. E.T. 10. Standard interim heading. Message area occupies 75% of form. No large central box or side boxes. | 
| Message area: | Blank. | 
| Reverse side: | Blank. | 
| Colours (text & form): | Black on green paper. | 
| Size of form overall: | 148 × 217 mm. | 
| Size of datestamp box: | 26 × 25 mm. | 
|  | SI-RO-2. Orroroo to GPO Adelaide Message comprised 20 words but it has been erased. | 
Details of use and rarity.
| Form sub-number | Schedule number | Earliest recorded date | Rarity rating | 
| RO-2 | 1 December 1914 at GPO Adelaide. | RR |