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.

HK020.10

Country / Post Hong Kong (PRC)
Date of Issue 15 July 2010
Primary theme Fauna (Frogs)
Subject Biodiversity - Liuixalus romeri
Width 45.0 mm
Height 28.0 mm
Denomination 2.40 HKD
Number in set 4 (show set)
Layout/Format sheet of 25
Perforations 13.35 by 14.25
Stamp issuing authority Hongkong Post
Printer Joh Enschedé BV, the Netherlands
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