| Heading and notes: | Standard two line heading above URGENT TELEGRAM in smaller letters than previously. | 
| Message area: | 9 lines - faint and continuous on type A & B, dotted black lines on type C. | 
| Reverse side: | Blank. | 
| Colours (text & form): | Black on dark pink with shades to bright pink. | 
| Size of form overall: | 170 × 209 mm. | 
| Size of datestamp box: | Varies across types. | 
|  | NI-DU-6A. Rialto, Melbourne to Sydney Telegraph Branch Sydney Characteristics: 
 The Post Office has added a D on the left side of this particulr form. Type DU-4 forms and DU-5A forms had the D printed to signify a terminating urgent telegram. | 
|  | NI-DU-6B. Windsor to Sydney Characteristics: 
 | 
|  | NI-EU-1. Delivery envelope accompanying the above telefram form. Note the two items are tied by the 751 on both. | 
|  | NI-DU-6C. Sydney to Wagga Wagga Characteristics: 
 This telegram was printed on light pink paper. See also Casualties of War. | 
Details of use and rarity.
| Form sub-number | Schedule number | Earliest recorded date | Rarity rating | 
| DU-6A | Form No. 144. | 6 March 1913 at Telegraph Branch/Sydney, NSW. | RRR | 
| DU-6B | None | 21 April 1914 at Telegraph Branch, Sydney. | RRR | 
| DU-6C | St 124. | 22 October 1914 at Wagga Wagga. | RRR |