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.

HK049.18

Country / Post Hong Kong (PRC)
Date of Issue 17 July 2018
Primary theme Mankind (Children)
Literature, Press and Comics (Calligraphy)
Subject Children Stamps - Fun with Numbers and Symbols
Width 27.5 mm
Height 27.5 mm
Denomination 2.00 HKD
Number in set 16 (show set)
Layout/Format sheet of 10, miniature sheet of 16 of 16 designs
Perforations 13 by 13
Stamp issuing authority Hongkong Post
Printer Joh Enschedé BV, the Netherlands
Connect to the web shop of the issuing stamp authority