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.

MO019.09

Country / Post Macao, China
Date of Issue 1 May 2009
Primary theme Economy & Industry
Politics & Government (Political Thought)
Subject 120th Anniversary of the International Labour Day
Width 40.0 mm
Height 30.0 mm
Denomination 1.50 MOP
Number in set 3 (show set)
Layout/Format sheet of 50
Perforations 13.25 by 13.25
Stamp issuing authority Macao Post
Printer Cartor Security Printing
Connect to the web shop of the issuing stamp authority