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.

DZ004.06

Country / Post Algeria
Date of Issue 25 January 2006
Primary theme Fauna (Birds - General)
Subject Wading Birds - Platalea leucorodia
Width 30.0 mm
Height 40.0 mm
Denomination 20.00 DZD
Number in set 4 (show set)
Layout/Format sheet of 25
Perforations 14 by 14
Stamp issuing authority Algerie Poste
Printer Imprimerie Banque Centrale D'Algerie