General characteristics:
| Heading and notes: | Form number No. 13. Has ELECTRIC TELEGRAPH with crest between words. The Lion and the Unicorn face away from each other in forms A and B. |
| Message area: | 20 boxes in four lines. |
| Reverse side: | Blank. |
| Colours (text & form): | Red on cream. |
| Size of form overall: | 194 × 223 mm. |
| Size of date stamp box: | 40 × 34 mm. |
Distinctive characteristics of the form:
Wagga Wagga, NSW to Adelaide Station 20 April 1876.The date stamp for TELEGRAPH OFFICE (Type 1) has no date
but ADELAIDE across the centre. It is very rare.
This form was enclosed in the
S.A. Colonial delivery envelope SC-EO-3 sent to London.
Another SC-DO-4A form is known with identical formatting on the front but,
on the reverse side, there are 68 boxes in 17 rows of 4.
There is also an inscription at the base of the reverse side for
"From ..." with two rows for that information.
The 27 word message was written on the front.
It was printed in orange ink.
Sent from from Blinman to Port Augusta on 28 March 1878.
Melbourne to Heidelberg, Germany repeated at Glenelg.
Adelaide to Port Augusta.Details of use and rarity.
| Form sub-number |
Schedule number | Earliest recorded date | Rarity rating |
| DO-4A | None | 20 April 1876 at Adelaide Station. | RRRR |
| DO-4B | None. | 4 November 1876 at Glenelg. | RRRR |
| DO-4C | None. | 22 April 1892 at Port Augusta. | RRRR |