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. Lk041.11-80
    Wns Number
    LK041.11
    Country / Post
    Sri Lanka
    Date of Issue
    September 27, 2011
    Subject
    World Tourism Day 2011 - Pristine
  2. Lk042.11-80
    Wns Number
    LK042.11
    Country / Post
    Sri Lanka
    Date of Issue
    September 27, 2011
    Subject
    World Tourism Day 2011 - Thrills
  3. Lk043.11-80
    Wns Number
    LK043.11
    Country / Post
    Sri Lanka
    Date of Issue
    October 01, 2011
    Subject
    World Children's Day 2011
  4. Lk044.11-80
    Wns Number
    LK044.11
    Country / Post
    Sri Lanka
    Date of Issue
    October 09, 2011
    Subject
    World Post Day 2011
  5. Lk045.11-80
    Wns Number
    LK045.11
    Country / Post
    Sri Lanka
    Date of Issue
    October 11, 2011
    Subject
    South Asian Beach Games 2011
  6. Lk046.11-80
    Wns Number
    LK046.11
    Country / Post
    Sri Lanka
    Date of Issue
    October 14, 2011
    Subject
    Centenary of Birth of Dudley Senanayake
  7. Lk047.11-80
    Wns Number
    LK047.11
    Country / Post
    Sri Lanka
    Date of Issue
    October 17, 2011
    Subject
    1919 - Government Information Centre
  8. Lk048.11-80
    Wns Number
    LK048.11
    Country / Post
    Sri Lanka
    Date of Issue
    October 28, 2011
    Subject
    Vintage and Classic Cars of Sri Lanka - Austin 12
  9. Lk049.11-80
    Wns Number
    LK049.11
    Country / Post
    Sri Lanka
    Date of Issue
    October 28, 2011
    Subject
    Vintage and Classic Cars of Sri Lanka - Rolls Royce 20/25
  10. Lk050.11-80
    Wns Number
    LK050.11
    Country / Post
    Sri Lanka
    Date of Issue
    October 28, 2011
    Subject
    Vintage and Classic Cars of Sri Lanka - Jaguar ss100

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