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.


Country / Post Portugal
Date of Issue 9 October 2012
Primary theme Energy
Subject 2012 Year of Sustainable Energy for All
Width 80.0 mm
Height 30.0 mm
Denomination 0.68 €
Number in set 19 (show set)
Layout/Format self adhesive sheet
Perforations imperforate
Stamp issuing authority CTT Correios de Portugal SA
Printer Litho Formas
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