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.

SE006.12

Country / Post Sweden
Date of Issue 12 January 2012
Primary theme Science & Technology (Mathematics)
Subject Geometric Figures
Width 26.5 mm
Height 25.0 mm
Denomination Ekonomibrev
Number in set 5 (show set)
Layout/Format self adhesive booklet 20 of 4 designs
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