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.

DZ010.06

Country / Post Algeria
Date of Issue 19 May 2006
Primary theme Education (Schools)
Subject 50th Anniversary of Student Day
Width 34.0 mm
Height 47.5 mm
Denomination 20.00 DZD
Number in set 1
Layout/Format sheet of 25
Perforations 14 by 14
Stamp issuing authority Algerie Poste
Printer Imprimerie Banque Centrale D'Algerie