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.

PT018.02

Country / Post Portugal
Date of Issue 26 February 2002
Primary theme Fauna (Birds - General)
Subject Birds of Portugal III - adorinha-do-mar-ana
Width 30.0 mm
Height 28.0 mm
Denomination 0.28 €
Number in set 6 (show set)
Layout/Format sheet
Perforations 11.9 by 11.6
Stamp issuing authority CTT Correios de Portugal SA
Printer
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