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.


Country / Post Hong Kong (PRC)
Date of Issue 16 July 2019
Primary theme Fauna (Fish)
Subject Underwater World of Hong Kong
Width 45.0 mm
Height 30.0 mm
Denomination 3.70 HKD
Number in set 6 (show set)
Layout/Format sheet of 25, miniature sheet of 6 of 6 designs
Perforations 13.25 by 13.5
Stamp issuing authority Hongkong Post
Printer Cartor Security Printing, France
Connect to the web shop of the issuing stamp authority