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.

Stamps issued with SL100.04

  1. Sl098.04-80
    Wns Number
    SL098.04
    Country / Post
    Sierra Leone
    Date of Issue
    December 21, 2004
    Subject
    Orchids - Odontonia Vesta
  2. Sl099.04-80
    Wns Number
    SL099.04
    Country / Post
    Sierra Leone
    Date of Issue
    December 21, 2004
    Subject
    Orchids - Ancistro Rothschildianus
  3. Sl100.04-80
    Wns Number
    SL100.04
    Country / Post
    Sierra Leone
    Date of Issue
    December 21, 2004
    Subject
    Orchids - Ansellia Africana
  4. Sl101.04-80
    Wns Number
    SL101.04
    Country / Post
    Sierra Leone
    Date of Issue
    December 21, 2004
    Subject
    Orchids - Aspasia Epidendroides
  5. Sl102.04-80
    Wns Number
    SL102.04
    Country / Post
    Sierra Leone
    Date of Issue
    December 21, 2004
    Subject
    Orchids - Bulbophyllum Lobbii