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.

SE003.12

Country / Post Sweden
Date of Issue 12 January 2012
Primary theme Science & Technology (Mathematics)
Subject Octahedrons
Width 27.0 mm
Height 31.0 mm
Denomination Ekonomibrev
Number in set 5 (show set)
Layout/Format coil of 100
Perforations 12 by imperf
Stamp issuing authority Posten Sverige AB
Printer Sweden Post Stamps Security Printing Works
Connect to the web shop of the issuing stamp authority