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.

EE017.05

Country / Post Estonia
Date of Issue 1 June 2005
Primary theme Fauna (Birds - General)
Mankind (Children)
Subject International Children's Day
Width 47.5 mm
Height 30.0 mm
Denomination 4.40 EEK
Number in set 2 (show set)
Layout/Format sheet of 10
Perforations 13.5 by 13.5
Stamp issuing authority Estonian Post
Printer Joh Enschedé Security Printers
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