Australia - International: OTC.
International delivery envelope: IAO-EO-1.

 
General characteristics:

Heading and notes: No form number.
Heading is INTERNATIONAL TELEGRAM in two lines.
Message area: Blank.
Reverse side: Name, logo and information.
Colours (text & envelope): Blue on cream.
Size of envelope overall: 91 × 165 mm.
Distinctive characteristics of this form:
 
IAO-EO-1 IAO-EO-1.

Used in Melbourne - probably on 17 September 1950 with OTC delivery form IAO-DO-1B.

IAO-EO-1 rev IAO-EO-1 (reverse).

Reverse side of th above delivery envelope showing the logo and the information about the OTC Offices in Sydney and Melbourne.

Details of use and rarity.

Form
sub-number
Schedule number Earliest recorded date Rarity rating
EO-1 None 3 November 1947 at ??. R