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 Poland with theme "Birds - General"

  1. Pl032.07-80
    Wns Number
    PL032.07
    Country / Post
    Poland
    Date of Issue
    September 11, 2007
    Subject
    Polish Zoos - Ciconia nigra - Black Stork
  2. Pl009.02-80
    Wns Number
    PL009.02
    Country / Post
    Poland
    Date of Issue
    March 08, 2002
    Subject
    Chicks

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