| Heading and notes: | Form number E. 19 in top right corner. Has TELEGRAM under the crest. |
| Reverse side: | Blank - no flap seal. |
| Colours (text & envelope): | Black on salmon. |
| Size of envelope: | 80 × 138 mm (with some variation). |
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SI-EO-2.
See use of this format to deliver a cable on ISI-DC-1. |
Details of use and rarity.
| Form sub-number |
Schedule number | Earliest recorded date | Rarity rating |
| EO-2 | None | RR |