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 CR006.16

  1. Cr005.16-80
    Wns Number
    CR005.16
    Country / Post
    Costa Rica
    Date of Issue
    July 15, 2016
    Subject
    UPAEP - Rio 2016 Olympic Games
  2. Cr006.16-80
    Wns Number
    CR006.16
    Country / Post
    Costa Rica
    Date of Issue
    July 15, 2016
    Subject
    UPAEP - Rio 2016 Olympic Games