The World Association for the Development of Philately (WADP) and the Universal Postal Union (UPU) jointly conceived and developed the WADP Numbering System - WNS, which was launched on 1 January 2002.

AX005.04

Country / Post Aland Islands
Date of Issue 23 April 2004
Primary theme National symbols
Subject 50th Anniversary of the Åland flag
Width 35.0 mm
Height 25.0 mm
Denomination 1st class
Number in set 1
Layout/Format self adhesive booklet of 8
Perforations 12.7 by 12.7
Stamp issuing authority Aland Post
Printer Cartor Security Printing