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.

HK012.10

Country / Post Hong Kong (PRC)
Date of Issue 8 May 2010
Primary theme Post & Philately (Philatelic Exhibitions)
Subject Stamp sheetlet to Commemorate Hongkong Post's Participation in London 2010 International Philatelic Exhibition
Width 45.0 mm
Height 28.0 mm
Denomination 10.00 HKD
Number in set 1
Layout/Format miniature sheet of 1
Perforations 13,25 by 13.25
Stamp issuing authority Hongkong Post
Printer Cartor Security Printing, France
Connect to the web shop of the issuing stamp authority