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 PT061.13

  1. Pt060.13-80
    Wns Number
    PT060.13
    Country / Post
    Portugal
    Date of Issue
    May 24, 2013
    Subject
    International Year of Statistics - 2013
  2. Pt061.13-80
    Wns Number
    PT061.13
    Country / Post
    Portugal
    Date of Issue
    May 24, 2013
    Subject
    International Year of Statistics - 2013
  3. Pt062.13-80
    Wns Number
    PT062.13
    Country / Post
    Portugal
    Date of Issue
    May 24, 2013
    Subject
    International Year of Statistics - 2013