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. Mt050.18-80
    Wns Number
    MT050.18
    Country / Post
    Malta
    Date of Issue
    November 16, 2018
    Subject
    Christmas 2018 - St Catherine's Parish Church, Żejtun
  2. Mt051.18-80
    Wns Number
    MT051.18
    Country / Post
    Malta
    Date of Issue
    November 16, 2018
    Subject
    Christmas 2018 - Basilica of the Nativity of Our Lady, Xagħra, Gozo
  3. Cl012.18-80
    Wns Number
    CL012.18
    Country / Post
    Chile
    Date of Issue
    November 20, 2018
    Subject
    Christmas 2018 - Children's Drawing Contest
  4. Cl013.18-80
    Wns Number
    CL013.18
    Country / Post
    Chile
    Date of Issue
    November 20, 2018
    Subject
    Christmas 2018 - Children's Drawing Contest
  5. Cl014.18-80
    Wns Number
    CL014.18
    Country / Post
    Chile
    Date of Issue
    November 20, 2018
    Subject
    Christmas 2018 - Children's Drawing Contest
  6. Cl015.18-80
    Wns Number
    CL015.18
    Country / Post
    Chile
    Date of Issue
    November 20, 2018
    Subject
    Christmas 2018 - Children's Drawing Contest
  7. Cl016.18-80
    Wns Number
    CL016.18
    Country / Post
    Chile
    Date of Issue
    November 20, 2018
    Subject
    Christmas 2018 - Children's Drawing Contest
  8. Py026.18-80
    Wns Number
    PY026.18
    Country / Post
    Paraguay
    Date of Issue
    November 22, 2018
    Subject
    Christmas 2018
  9. Py027.18-80
    Wns Number
    PY027.18
    Country / Post
    Paraguay
    Date of Issue
    November 22, 2018
    Subject
    Christmas 2018
  10. Gr047.18-80
    Wns Number
    GR047.18
    Country / Post
    Greece
    Date of Issue
    November 23, 2018
    Subject
    Christmas 2018 - Letter to Santa