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.

SG001.04

Country / Post Singapore
Date of Issue 9 January 2004
Primary theme Holy Days & Celebrations
Subject Year of the Monkey - Graphic illustrastions of Monkey
Width 40.0 mm
Height 30.0 mm
Denomination FLAO
Number in set 2 (show set)
Layout/Format sheet of 50
Perforations 14.1 by 13.4
Stamp issuing authority Singapore Post Limited
Printer Joh Enschede Security Printers
Connect to the web shop of the issuing stamp authority