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 CH023.05

  1. Ch020.05-80
    Wns Number
    CH020.05
    Country / Post
    Switzerland
    Date of Issue
    May 10, 2005
    Subject
    Pro Patria - Historical Monuments of Switzerland - Rotach houses , Zurich
  2. Ch021.05-80
    Wns Number
    CH021.05
    Country / Post
    Switzerland
    Date of Issue
    May 10, 2005
    Subject
    Pro Patria - Historical Monuments of Switzerland - Monte Carasso Abbey, TI
  3. Ch022.05-80
    Wns Number
    CH022.05
    Country / Post
    Switzerland
    Date of Issue
    May 10, 2005
    Subject
    Pro Patria - Historical Monuments of Switzerland - St. Katharinental Abbey, Diessenhofen TG
  4. Ch023.05-80
    Wns Number
    CH023.05
    Country / Post
    Switzerland
    Date of Issue
    May 10, 2005
    Subject
    Pro Patria - Historical Monuments of Switzerland - Palais Wilson, Geneva