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 Burundi in 2011

The 2011 issuing programme is not available.
  1. Bi001.11-80
    Wns Number
    BI001.11
    Country / Post
    Burundi
    Date of Issue
    March 15, 2011
    Subject
    Monkeys of Burundi - Chimpanzee
  2. Bi002.11-80
    Wns Number
    BI002.11
    Country / Post
    Burundi
    Date of Issue
    March 15, 2011
    Subject
    Monkeys of Burundi - Baboons
  3. Bi003.11-80
    Wns Number
    BI003.11
    Country / Post
    Burundi
    Date of Issue
    March 15, 2011
    Subject
    Monkeys of Burundi - Gorillas