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 IO012.07

  1. Io012.07-80
    Wns Number
    IO012.07
    Country / Post
    British Indian Ocean Territories
    Date of Issue
    July 23, 2007
    Subject
    125th Anniversary of the Death of Charles Darwin
  2. Io013.07-80
    Wns Number
    IO013.07
    Country / Post
    British Indian Ocean Territories
    Date of Issue
    July 23, 2007
    Subject
    125th Anniversary of the Death of Charles Darwin
  3. Io014.07-80
    Wns Number
    IO014.07
    Country / Post
    British Indian Ocean Territories
    Date of Issue
    July 23, 2007
    Subject
    125th Anniversary of the Death of Charles Darwin
  4. Io015.07-80
    Wns Number
    IO015.07
    Country / Post
    British Indian Ocean Territories
    Date of Issue
    July 23, 2007
    Subject
    125th Anniversary of the Death of Charles Darwin