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.

SD002.11

Country / Post Sudan
Date of Issue 27 July 2011
Primary theme Politics & Government
Science & Technology (Information Technology)
Subject Sudan e.Government
Width 30.0 mm
Height 50.0 mm
Denomination 5.50 SDD
Number in set 3 (show set)
Layout/Format sheet
Perforations 14 by 14
Stamp issuing authority Post and Telegraph Public Corp of Sudan
Printer