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 CA038.18

  1. Ca038.18-80
    Wns Number
    CA038.18
    Country / Post
    Canada
    Date of Issue
    February 01, 2018
    Subject
    Black History - Kathleen (Kay) Livingstone
  2. Ca039.18-80
    Wns Number
    CA039.18
    Country / Post
    Canada
    Date of Issue
    February 01, 2018
    Subject
    Black History - Lincoln M. Alexander