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 BO050.06

  1. Bo049.06-80
    Wns Number
    BO049.06
    Country / Post
    Bolivia
    Date of Issue
    December 11, 2006
    Subject
    Birds of the District of Pando - Toucan
  2. Bo050.06-80
    Wns Number
    BO050.06
    Country / Post
    Bolivia
    Date of Issue
    December 11, 2006
    Subject
    Birds of the District of Pando - Pajaro azul