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 Paraguay in 2004

The 2004 issuing programme is not available.
  1. Py011.04-80
    Wns Number
    PY011.04
    Country / Post
    Paraguay
    Date of Issue
    August 24, 2004
    Subject
    José A Flores Centennial of his Birth
  2. Py012.04-80
    Wns Number
    PY012.04
    Country / Post
    Paraguay
    Date of Issue
    August 26, 2004
    Subject
    25th Anniversary of the Clay Museum
  3. Py013.04-80
    Wns Number
    PY013.04
    Country / Post
    Paraguay
    Date of Issue
    August 26, 2004
    Subject
    25th Anniversary of the Clay Museum
  4. Py014.04-80
    Wns Number
    PY014.04
    Country / Post
    Paraguay
    Date of Issue
    August 26, 2004
    Subject
    25th Anniversary of the Clay Museum
  5. Py015.04-80
    Wns Number
    PY015.04
    Country / Post
    Paraguay
    Date of Issue
    September 22, 2004
    Subject
    Paraguayan Railroad - Loc.151 (N.B.L.) - 1911 'Camello'
  6. Py016.04-80
    Wns Number
    PY016.04
    Country / Post
    Paraguay
    Date of Issue
    September 22, 2004
    Subject
    Paraguayan Railroad - Loc.104 (N.B.L.) - 1911 'El Coqueto'
  7. Py017.04-80
    Wns Number
    PY017.04
    Country / Post
    Paraguay
    Date of Issue
    September 22, 2004
    Subject
    Paraguayan Railroad - Loc.10 (Krupp) - 1886 'Sapucai'
  8. Py018.04-80
    Wns Number
    PY018.04
    Country / Post
    Paraguay
    Date of Issue
    October 11, 2004
    Subject
    America 2004 - Protection of the Environment - Procnias nudicollis
  9. Py019.04-80
    Wns Number
    PY019.04
    Country / Post
    Paraguay
    Date of Issue
    October 11, 2004
    Subject
    America 2004 - Protection of the Environment - Ceratophrys cranwelli
  10. Py020.04-80
    Wns Number
    PY020.04
    Country / Post
    Paraguay
    Date of Issue
    October 22, 2004
    Subject
    MERCOSUR - Water, a resource in short supply - Felis pardalis