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 GL018.16

  1. Gl017.16-80
    Wns Number
    GL017.16
    Country / Post
    Greenland
    Date of Issue
    October 17, 2016
    Subject
    Zackenberg Research Station
  2. Gl018.16-80
    Wns Number
    GL018.16
    Country / Post
    Greenland
    Date of Issue
    October 17, 2016
    Subject
    Zackenberg Research Station