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.

SI004.09

Country / Post Slovenia
Date of Issue 30 January 2009
Primary theme Science & Technology (Famous scientists)
Geography & Meteorology (Maps & Cartography)
Subject Jozef Mrak - Geodesist & builder
Width 40.0 mm
Height 30.0 mm
Denomination 0.92 €
Number in set 1
Layout/Format sheet of 25
Perforations 14 by 14
Stamp issuing authority Post of Slovenia
Printer Oriental Press Bahrain
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