Australia - International - Eastern Extension.
Delivery envelope: IAX-EO-1.

General characteristics:

Heading and notes: TELEGRAM IMMEDIATE - no logo.
Company name is 2nd line of the heading.
Message area: SYDNEY (which has been lined out).
Reverse side: Blank.
Colours (text & form): Orange-brown.
Size of envelope overall: 78 × 137 mm.
Distinctive characteristics of this form:
Regd sydney front IAX-EO-1.

Used delivery envelope.
Sent by registered mail from Sydney for delivery in Nauru. Franked with a ½d green and two 2½d blue Kangaroo on Map stamps.
20 March 1913.
Inscribed with "Rec. 6 May".

A unique cover.


  • no markings apart from the heading on the front and the entry SYDNEY;
  • flap has a rounded peak and curved sides.

Details of use and rarity.

Schedule number Earliest recorded date Rarity rating
EO-1 None 20 March 1913 at Sydney. RRRR (used)