| Heading and notes: | No form number. Heading is South Australian Magnetic Telegraph and the Crest is in the Centre. | 
| Message area: | Blank - message area takes up about 70% of the form. | 
| Reverse side: | Blank. | 
| Colours (text & form): | Black on blue. | 
| Size of form overall: | A: 261 × 211 mm. B: 222 × 208 mm. | 
|  | SC-DO-2. Adelaide to Mount Gambier Characteristics: 
 Type B form (see size box above) has the same heading but is slightly shorter. | 
Details of use and rarity.
| Form sub-number | Schedule number | Earliest recorded date | Rarity rating | 
| DO-2 | None | 20 October 1862 at Mount Gambier. | RRR |