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 XJ020.10

  1. Xj019.10-80
    Wns Number
    XJ019.10
    Country / Post
    Bosnia and Herzegovina - Croatian Post Ltd Mostar
    Date of Issue
    November 01, 2010
    Subject
    Flora 2010 - Mushrooms - Fly agaric and Puffball mushroom
  2. Xj020.10-80
    Wns Number
    XJ020.10
    Country / Post
    Bosnia and Herzegovina - Croatian Post Ltd Mostar
    Date of Issue
    November 01, 2010
    Subject
    Flora 2010 - Mushrooms - Puffball mushroom