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.

MO020.18

Country / Post Macao, China
Date of Issue 6 July 2018
Primary theme Literature, Press and Comics (Calligraphy)
Subject Chapas Sínicas
Width 30.0 mm
Height 40.0 mm
Denomination 3.00 MOP
Number in set 5 (show set)
Layout/Format sheet of 16 of 4 designs
Perforations 13 by 13
Stamp issuing authority Macao Post
Printer Cartor Security Printing
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