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. Sl061.04-80
    Wns Number
    SL061.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Tiger Swallowtail
  2. Sl062.04-80
    Wns Number
    SL062.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Belted Kingfisher
  3. Sl063.04-80
    Wns Number
    SL063.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Burrowing Owl
  4. Sl064.04-80
    Wns Number
    SL064.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Crested Caracara
  5. Sl065.04-80
    Wns Number
    SL065.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Red Headed Finch
  6. Sl066.04-80
    Wns Number
    SL066.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Ring Neck Pheasant
  7. Sl067.04-80
    Wns Number
    SL067.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Snail Kite
  8. Sl068.04-80
    Wns Number
    SL068.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Avocet
  9. Sl069.04-80
    Wns Number
    SL069.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Greater Flamingo
  10. Sl070.04-80
    Wns Number
    SL070.04
    Country / Post
    Sierra Leone
    Date of Issue
    May 17, 2004
    Subject
    Bald Eagle