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.

CH025.05

Country / Post Switzerland
Date of Issue 6 September 2005
Primary theme Science & Technology
Subject Subtractive synthesis
Width 40.0 mm
Height 32.5 mm
Denomination 0.50 CHF
Number in set 2 (show set)
Layout/Format self adhesive sheet of 20
Perforations 14 by 14
Stamp issuing authority La Poste
Printer Cartor Security Printing
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