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 by Ethiopia in 2012

The 2012 issuing programme is not available.
  1. Et011.12-80
    Wns Number
    ET011.12
    Country / Post
    Ethiopia
    Date of Issue
    September 08, 2012
    Subject
    Ethiopian Writers 2nd series - Yoftahe Nigussie
  2. Et012.12-80
    Wns Number
    ET012.12
    Country / Post
    Ethiopia
    Date of Issue
    September 08, 2012
    Subject
    Ethiopian Writers 2nd series - Afework Gebreyesus