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.

LI017.10

Country / Post Liechtenstein
Date of Issue 7 June 2010
Primary theme Politics & Government (Police)
Subject 50 Years of Interpol Valduz
Width 32.5 mm
Height 32.5 mm
Denomination 1.90 CHF
Number in set 3 (show set)
Layout/Format sheet of 20
Perforations 12.5 by 12.5
Stamp issuing authority Liechtensteinische Post AG
Printer Joh Enschedé Security Printers
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