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.

SZ008.04

Country / Post Swaziland
Date of Issue 11 October 2004
Primary theme Fauna (Birds - General)
Subject SAPOA Joint stamp issue - Cattle Egret (Botswana bird)
Width 40.0 mm
Height 34.0 mm
Denomination 1.90 SZL
Number in set 13 (show set)
Layout/Format miniature sheet of 8 of 8 designs
Perforations 13.8 by 13.8
Stamp issuing authority Swaziland Posts and Telecommunications Corporation
Printer Joh Enschede Security Printer