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.

AO001.03

Country / Post Angola
Date of Issue 30 May 2003
Primary theme United Nations
Science & Technology
Subject 3rd Meeting on United Nations Science, Technology and Development
Width 40.0 mm
Height 30.0 mm
Denomination 50.00 AOA
Number in set 1
Layout/Format sheet
Perforations 13 by 13.2
Stamp issuing authority Empresa Nacional de Correios e Telegrafos de Angola
Printer Cartor Security Printing