| Heading and notes: | CABLEGRAM under the Standard Commonwealth format. | 
| Message area: | Blank. | 
| Reverse side: | Blank. | 
| Colours (text & form): | Black on cream. | 
| Size of form overall: | 178 × 210 mm. | 
| Size of datestamp box: | 25 × 26 mm. | 
DC-3A: has Form number E.T. No. 7.
DC-3B: has Form number E.T. No. 8.
   
Details of use and rarity.
| Form sub-number | Schedule number | Earliest recorded date | Rarity rating | 
| DC-3A | 2000000 - 29.11.17 | 30 September 1938 (well after printing!!). | RRR (used) | 
| DC-3B | 70M - 8.21 4233. | R | |
| 70M - 4.24 6912. | 6 February 1930 at Ceduna, S.A.. | RRR (used) |