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.

SY004.16

Country / Post Syrian Arab Republic
Date of Issue 1 May 2016
Primary theme Politics & Government
Economy & Industry
Subject International Labour Day - First of May
Width 37.0 mm
Height 37.0 mm
Denomination 300 SYP
Number in set 1
Layout/Format sheet of 50
Perforations 12.5 by 12.5
Stamp issuing authority Syrian Arab Republic General Establishment of Posts
Printer Imprimerie et journal officiel