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.

AX010.04

Country / Post Aland Islands
Date of Issue 9 June 2004
Primary theme History
Military
Subject The Fortress of Bomarsund 1854-2004
Width 30.0 mm
Height 37.5 mm
Denomination 0.75 €
Number in set 4 (show set)
Layout/Format booklet of 8 of 4 designs
Perforations 13.3 by 13.3
Stamp issuing authority Aland Post
Printer Cartor Security Printing