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.

All registered stamps issued in 2018 with theme "Christmas & Easter"

  1. Cl013.18-80
    Wns Number
    CL013.18
    Country / Post
    Chile
    Date of Issue
    November 20, 2018
    Subject
    Christmas 2018 - Children's Drawing Contest
  2. Cl014.18-80
    Wns Number
    CL014.18
    Country / Post
    Chile
    Date of Issue
    November 20, 2018
    Subject
    Christmas 2018 - Children's Drawing Contest
  3. Cl015.18-80
    Wns Number
    CL015.18
    Country / Post
    Chile
    Date of Issue
    November 20, 2018
    Subject
    Christmas 2018 - Children's Drawing Contest
  4. Cl016.18-80
    Wns Number
    CL016.18
    Country / Post
    Chile
    Date of Issue
    November 20, 2018
    Subject
    Christmas 2018 - Children's Drawing Contest
  5. Py026.18-80
    Wns Number
    PY026.18
    Country / Post
    Paraguay
    Date of Issue
    November 22, 2018
    Subject
    Christmas 2018
  6. Py027.18-80
    Wns Number
    PY027.18
    Country / Post
    Paraguay
    Date of Issue
    November 22, 2018
    Subject
    Christmas 2018
  7. Gr047.18-80
    Wns Number
    GR047.18
    Country / Post
    Greece
    Date of Issue
    November 23, 2018
    Subject
    Christmas 2018 - Letter to Santa
  8. Gr048.18-80
    Wns Number
    GR048.18
    Country / Post
    Greece
    Date of Issue
    November 23, 2018
    Subject
    Christmas 2018 - Santa reads children's letters
  9. Gr049.18-80
    Wns Number
    GR049.18
    Country / Post
    Greece
    Date of Issue
    November 23, 2018
    Subject
    Christmas 2018 - Posting Santa's letter
  10. Gr050.18-80
    Wns Number
    GR050.18
    Country / Post
    Greece
    Date of Issue
    November 23, 2018
    Subject
    Christmas 2018 - Christmas presents