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 XJ017.10

  1. Xj016.10-80
    Wns Number
    XJ016.10
    Country / Post
    Bosnia and Herzegovina - Croatian Post Ltd Mostar
    Date of Issue
    October 06, 2010
    Subject
    International Habitat Protection Day - Prokosko lake and Triturus alpestris reiseri
  2. Xj017.10-80
    Wns Number
    XJ017.10
    Country / Post
    Bosnia and Herzegovina - Croatian Post Ltd Mostar
    Date of Issue
    October 06, 2010
    Subject
    International Habitat Protection Day - Prokosko lake