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.

EE011.12

Country / Post Estonia
Date of Issue 19 April 2012
Primary theme Fauna (Birds - General)
Subject Bird of the Year - Ringed Plover
Width 40.88 mm
Height 41.3 mm
Denomination 0.45 €
Number in set 1
Layout/Format sheet of 20
Perforations 12.75 by 13
Stamp issuing authority Estonian Post
Printer AS VABA MAA Tallinn
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