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.

ET001.10

Country / Post Ethiopia
Date of Issue 6 April 2010
Primary theme Post & Philately
Subject 30th Anniversary of Pan African Postal Union
Width 30.0 mm
Height 40.0 mm
Denomination 0.45 ETB
Number in set 3 (show set)
Layout/Format sheet
Perforations 13.5 by 13.5
Stamp issuing authority Ethiopian Postal Service
Printer Joh Enschedé Security Printers