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 ET004.12

  1. Et001.12-80
    Wns Number
    ET001.12
    Country / Post
    Ethiopia
    Date of Issue
    April 10, 2012
    Subject
    Medicinal Plants - Lippia adoensis
  2. Et002.12-80
    Wns Number
    ET002.12
    Country / Post
    Ethiopia
    Date of Issue
    April 10, 2012
    Subject
    Medicinal Plants - Artemisia absinthium
  3. Et003.12-80
    Wns Number
    ET003.12
    Country / Post
    Ethiopia
    Date of Issue
    April 10, 2012
    Subject
    Medicinal Plants - Thymus achimperi
  4. Et004.12-80
    Wns Number
    ET004.12
    Country / Post
    Ethiopia
    Date of Issue
    April 10, 2012
    Subject
    Medicinal Plants - Ocimum oamifolium