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 Sri Lanka in 2011

The 2011 issuing programme is not available.
  1. Lk021.11-80
    Wns Number
    LK021.11
    Country / Post
    Sri Lanka
    Date of Issue
    May 07, 2011
    Subject
    150th Anniversary of the Birth of Rabindranath Tagore
  2. Lk022.11-80
    Wns Number
    LK022.11
    Country / Post
    Sri Lanka
    Date of Issue
    May 14, 2011
    Subject
    Vesak 2011 - Lumbini
  3. Lk023.11-80
    Wns Number
    LK023.11
    Country / Post
    Sri Lanka
    Date of Issue
    May 14, 2011
    Subject
    Vesak 2011 - Buddhagaya
  4. Lk024.11-80
    Wns Number
    LK024.11
    Country / Post
    Sri Lanka
    Date of Issue
    May 14, 2011
    Subject
    Vesak 2011 - Benares - Isipathana
  5. Lk025.11-80
    Wns Number
    LK025.11
    Country / Post
    Sri Lanka
    Date of Issue
    May 14, 2011
    Subject
    Vesak 2011 - Kusinara
  6. Lk026.11-80
    Wns Number
    LK026.11
    Country / Post
    Sri Lanka
    Date of Issue
    May 27, 2011
    Subject
    Bridges and Culverts in Sri Lanka - Stone Bridge - Mahakanadarawa
  7. Lk027.11-80
    Wns Number
    LK027.11
    Country / Post
    Sri Lanka
    Date of Issue
    May 27, 2011
    Subject
    Bridges and Culverts in Sri Lanka - Wooden Bridge - Bogoda
  8. Lk028.11-80
    Wns Number
    LK028.11
    Country / Post
    Sri Lanka
    Date of Issue
    May 27, 2011
    Subject
    Bridges and Culverts in Sri Lanka - Suspension Bridge - Peradeniya
  9. Lk029.11-80
    Wns Number
    LK029.11
    Country / Post
    Sri Lanka
    Date of Issue
    May 27, 2011
    Subject
    Bridges and Culverts in Sri Lanka - Steel Arch Bridge - Ruwanwella
  10. Lk030.11-80
    Wns Number
    LK030.11
    Country / Post
    Sri Lanka
    Date of Issue
    July 01, 2011
    Subject
    50th Anniversary of the People's Bank

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