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 MN021.13

  1. Mn021.13-80
    Wns Number
    MN021.13
    Country / Post
    Mongolia
    Date of Issue
    December 22, 2013
    Subject
    Year of the Horse
  2. Mn022.13-80
    Wns Number
    MN022.13
    Country / Post
    Mongolia
    Date of Issue
    December 22, 2013
    Subject
    Year of the Horse