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.

SZ004.06

Country / Post Swaziland
Date of Issue 10 January 2006
Primary theme Royalty & Monarchies
Subject Queen Mothers of Swaziland - Labotsibeni Mdluli 1895-1921
Width 27.0 mm
Height 41.5 mm
Denomination 2.45 SZL
Number in set 5 (show set)
Layout/Format miniature sheet of 5 of 5 designs
Perforations 14 by 14
Stamp issuing authority Swaziland Posts and Telecommunications Corporation
Printer Joh Enschede Security Printer