Australia - International: OTC.
International delivery form: IAO-DO-1.

  
General characteristics:

Heading and notes: Form number T.O. 3c in lower left corner.
Heading is INTERNATIONAL TELEGRAM.
Message area: Blank.
Reverse side: Blank.
Colours (text & form): Blue on cream.
Size of form overall: 200 × 200 mm.
Distinctive characteristics of this form:
 
IAO-DO-1A IAO-DO-1A.

Singapore to Rockdale, NSW via Sydney Office.
(27 December 1949).

Characteristics:

  • two telephone numbers for each of Sydney and Melbourne;
  • no schedule numbers;
  • heading INTERNATIONAL TELEGRAM is in 3 mm high sans-serif font;
IAO-DO-1B IAO-DO-1B.

Singapore to Melbourne via Sydney Office.
(17 September 1950).

Characteristics:

  • one telephone number for each of Sydney and Melbourne;
  • schedule numbers at right below the heading and in the lower right corner;
  • heading INTERNATIONAL TELEGRAM is in 4 mm high serif font;
IAO-EO-1

IAO-EO-1.

Delivery envelope perhaps accompanying the above form (they came as a pair).

The number on the envelope is 164 while that on the form is 144.

"RED" on the envelope refers to the colour code on the form.

Details of use and rarity.

Form
sub-number		 Schedule number Earliest recorded date Rarity rating
DO-1A None 20 September 1949 at Sydney. R
DO-1B 89782 / S2522 13 August 1950 at Melbourne. R