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 by Sierra Leone in 2004

The 2004 issuing programme is not available.
  1. Sl041.04-80
    Wns Number
    SL041.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 10, 2004
    Subject
    John Glenn - America's first astronaut to orbit the Earth
  2. Sl042.04-80
    Wns Number
    SL042.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 10, 2004
    Subject
    Yang Lewei orbits the Earth
  3. Sl043.04-80
    Wns Number
    SL043.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 10, 2004
    Subject
    Yang Lewei orbits the Earth
  4. Sl044.04-80
    Wns Number
    SL044.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 10, 2004
    Subject
    Yang Lewei orbits the Earth
  5. Sl045.04-80
    Wns Number
    SL045.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 10, 2004
    Subject
    Yang Lewei orbits the Earth
  6. Sl046.04-80
    Wns Number
    SL046.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 10, 2004
    Subject
    Yang Lewei orbits the Earth
  7. Sl047.04-80
    Wns Number
    SL047.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 10, 2004
    Subject
    Yang Lewei orbits the Earth - Vostok1
  8. Sl048.04-80
    Wns Number
    SL048.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 10, 2004
    Subject
    Yang Lewei orbits the Earth - John Glenn
  9. Sl049.04-80
    Wns Number
    SL049.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 10, 2004
    Subject
    Yang Lewei orbits the Earth - Friendship 7
  10. Sl050.04-80
    Wns Number
    SL050.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 10, 2004
    Subject
    Yang Lewei orbits the Earth - Yuri Gagarin