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.

IT027.06

Country / Post Italy
Date of Issue 18 March 2006
Primary theme National symbols (Flags)
Engineering (Civil & Mechanical)
Subject Centenary of the Opening of the Sempione Tunnel
Width 30.0 mm
Height 40.0 mm
Denomination 0.62 €
Number in set 1
Layout/Format sheet of 50
Perforations 13.25 by 13
Stamp issuing authority Ministry of Communications
Printer IPZS