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.

ZA090.13

Country / Post South Africa
Date of Issue 29 November 2013
Primary theme Medicine (Cancer & AIDS)
Subject World AIDS Day - 25th Anniversary
Width 23.5 mm
Height 30.0 mm
Denomination Standard Postage
Number in set 5 (show set)
Layout/Format self adhesive booklet of 10 of 5 designs
Perforations 14 by 14
Stamp issuing authority South African Post Office
Printer Southern Colour Print