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.

SI013.18

Country / Post Slovenia
Date of Issue 23 March 2018
Primary theme Fauna (Elephants)
Fauna (Prehistoric)
Subject Fossil Mammals in Slovenia - Mastodon
Width 42.6 mm
Height 29.82 mm
Denomination 0.78 €
Number in set 1
Layout/Format sheet of 25
Perforations 14 by 14
Stamp issuing authority Post of Slovenia
Printer Agencija za komercijalnu djelatnost doo Zagreb Croatia
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