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 CZ017.19

  1. Cz016.19-80
    Wns Number
    CZ016.19
    Country / Post
    Czech Republic
    Date of Issue
    May 22, 2019
    Subject
    Prague Castle in the Seasons of the Year - Summer
  2. Cz017.19-80
    Wns Number
    CZ017.19
    Country / Post
    Czech Republic
    Date of Issue
    May 22, 2019
    Subject
    Prague Castle in the Seasons of the Year - Winter