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 PT073.12

  1. Pt072.12-80
    Wns Number
    PT072.12
    Country / Post
    Portugal
    Date of Issue
    June 27, 2012
    Subject
    Venus' Solar Transit 2012
  2. Pt073.12-80
    Wns Number
    PT073.12
    Country / Post
    Portugal
    Date of Issue
    June 27, 2012
    Subject
    Venus Solar Transit 2012