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.


Country / Post Slovenia
Date of Issue 22 March 2019
Primary theme Science & Technology (Time measurement)
Subject Joint issue Slovenia - Slovakia - Sundial
Width 28.0 mm
Height 45.0 mm
Denomination 1.17 €
Number in set 2 (show set)
Layout/Format sheet of 8
Perforations 13.5 by 13.25
Stamp issuing authority Post of Slovenia
Printer Cartor Security Printing France
Connect to the web shop of the issuing stamp authority