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. Sl051.04-80
    Wns Number
    SL051.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 10, 2004
    Subject
    Yang Lewei orbits the Earth - Shenzhou 5
  2. Sl052.04-80
    Wns Number
    SL052.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 10, 2004
    Subject
    Yang Lewei orbits the Earth
  3. Sl053.04-80
    Wns Number
    SL053.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Lo Moth
  4. Sl054.04-80
    Wns Number
    SL054.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Hackberry Butterfly
  5. Sl055.04-80
    Wns Number
    SL055.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Red Admiral
  6. Sl056.04-80
    Wns Number
    SL056.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Spangled Fritillary
  7. Sl057.04-80
    Wns Number
    SL057.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Cecropia Moth
  8. Sl058.04-80
    Wns Number
    SL058.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Pearl Crescent
  9. Sl059.04-80
    Wns Number
    SL059.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Pipevine Swallowtail
  10. Sl060.04-80
    Wns Number
    SL060.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Alfalfa Looper