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.

XE004.16

Country / Post Azores
Date of Issue 16 May 2016
Primary theme Fauna (Cetaceans)
Environment & Conservation
Subject Azores Certified by Nature - Whale Watching
Width 40.0 mm
Height 30.6 mm
Denomination 0.75 €
Number in set 6 (show set)
Layout/Format sheet of 50
Perforations 13 by 13
Stamp issuing authority CTT Correios de Portugal SA
Printer Cartor Security Printers
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