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.

CZ011.16

Country / Post Czech Republic
Date of Issue 27 April 2016
Primary theme Fauna (Butterflies)
Subject Swallowtails
Width 40.0 mm
Height 30.0 mm
Denomination 16 CZK
Number in set 1
Layout/Format sheet of 50
Perforations 12 by 12
Stamp issuing authority Czech Post
Printer Post Printing House
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