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. Lk031.11-80
    Wns Number
    LK031.11
    Country / Post
    Sri Lanka
    Date of Issue
    July 15, 2011
    Subject
    Centenary of Radampola Sri Sumangala Central College
  2. Lk032.11-80
    Wns Number
    LK032.11
    Country / Post
    Sri Lanka
    Date of Issue
    July 21, 2011
    Subject
    50th Anniversary of the Non-aligned movement
  3. Lk033.11-80
    Wns Number
    LK033.11
    Country / Post
    Sri Lanka
    Date of Issue
    September 27, 2011
    Subject
    World Tourism Day 2011 - Heritage
  4. Lk034.11-80
    Wns Number
    LK034.11
    Country / Post
    Sri Lanka
    Date of Issue
    September 27, 2011
    Subject
    World Tourism Day 2011 - Heritage
  5. Lk035.11-80
    Wns Number
    LK035.11
    Country / Post
    Sri Lanka
    Date of Issue
    September 27, 2011
    Subject
    World Tourism Day 2011 - Heritage
  6. Lk036.11-80
    Wns Number
    LK036.11
    Country / Post
    Sri Lanka
    Date of Issue
    September 27, 2011
    Subject
    World Tourism Day 2011 - Heritage
  7. Lk037.11-80
    Wns Number
    LK037.11
    Country / Post
    Sri Lanka
    Date of Issue
    September 27, 2011
    Subject
    World Tourism Day 2011 - Heritage
  8. Lk038.11-80
    Wns Number
    LK038.11
    Country / Post
    Sri Lanka
    Date of Issue
    September 27, 2011
    Subject
    World Tourism Day 2011 - Heritage
  9. Lk039.11-80
    Wns Number
    LK039.11
    Country / Post
    Sri Lanka
    Date of Issue
    September 27, 2011
    Subject
    World Tourism Day 2011 - Wild
  10. Lk040.11-80
    Wns Number
    LK040.11
    Country / Post
    Sri Lanka
    Date of Issue
    September 27, 2011
    Subject
    World Tourism Day 2011 - Wild

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