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.

DZ007.12

Country / Post Algeria
Date of Issue 28 March 2012
Primary theme Fauna
Subject Snails - Eobania vermiculata
Width 34.0 mm
Height 47.5 mm
Denomination 20.00 DZD
Number in set 2 (show set)
Layout/Format sheet of 25
Perforations 13 by 13
Stamp issuing authority Algerie Poste
Printer Imprimerie Banque Centrale d'Algerie