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.

SI020.18

Country / Post Slovenia
Date of Issue 25 May 2018
Primary theme Folklore & Mythology
Subject Popular superstition and magic in Slovenia - Witches
Width 25.56 mm
Height 48.28 mm
Denomination 0.40 €
Number in set 5 (show set)
Layout/Format sheet of 10
Perforations 14 by 14
Stamp issuing authority Post of Slovenia
Printer Agencija za komercijalnu djelatnost doo Zagreb Croatia
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