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.

Stamps issued with SG001.04

  1. Sg001.04-80
    Wns Number
    SG001.04
    Country / Post
    Singapore
    Date of Issue
    January 09, 2004
    Subject
    Year of the Monkey - Graphic illustrastions of Monkey
  2. Sg002.04-80
    Wns Number
    SG002.04
    Country / Post
    Singapore
    Date of Issue
    January 09, 2004
    Subject
    Year of the Monkey - Graphic illustrastions of Monkey