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. Sl011.04-80
    Wns Number
    SL011.04
    Country / Post
    Sierra Leone
    Date of Issue
    January 29, 2004
    Subject
    British Council - 60 Years working with Sierra Leone
  2. Sl012.04-80
    Wns Number
    SL012.04
    Country / Post
    Sierra Leone
    Date of Issue
    January 29, 2004
    Subject
    British Council - 60 Years working with Sierra Leone
  3. Sl013.04-80
    Wns Number
    SL013.04
    Country / Post
    Sierra Leone
    Date of Issue
    January 29, 2004
    Subject
    British Council - 60 Years working with Sierra Leone
  4. Sl014.04-80
    Wns Number
    SL014.04
    Country / Post
    Sierra Leone
    Date of Issue
    January 29, 2004
    Subject
    British Council - 60 Years working with Sierra Leone
  5. Sl015.04-80
    Wns Number
    SL015.04
    Country / Post
    Sierra Leone
    Date of Issue
    February 04, 2004
    Subject
    40th Anniversary of first self adhesive stamp
  6. Sl016.04-80
    Wns Number
    SL016.04
    Country / Post
    Sierra Leone
    Date of Issue
    February 24, 2004
    Subject
    Concord over Rio
  7. Sl017.04-80
    Wns Number
    SL017.04
    Country / Post
    Sierra Leone
    Date of Issue
    February 24, 2004
    Subject
    Concord over Rio
  8. Sl018.04-80
    Wns Number
    SL018.04
    Country / Post
    Sierra Leone
    Date of Issue
    February 24, 2004
    Subject
    Concord over Rio
  9. Sl019.04-80
    Wns Number
    SL019.04
    Country / Post
    Sierra Leone
    Date of Issue
    February 24, 2004
    Subject
    Concord over Giza
  10. Sl020.04-80
    Wns Number
    SL020.04
    Country / Post
    Sierra Leone
    Date of Issue
    February 24, 2004
    Subject
    Concord over Giza