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 MX004.06

  1. Mx004.06-80
    Wns Number
    MX004.06
    Country / Post
    Mexico
    Date of Issue
    April 26, 2006
    Subject
    50th Anniversary of the Latin American Tower
  2. Mx005.06-80
    Wns Number
    MX005.06
    Country / Post
    Mexico
    Date of Issue
    April 26, 2006
    Subject
    50th Anniversary of the Latin American Tower