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.

All registered stamps issued in 2018 with theme "Christmas & Easter"

  1. Am039.18-80
    Wns Number
    AM039.18
    Country / Post
    Armenia
    Date of Issue
    December 28, 2018
    Subject
    Christmas and New Year