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 Oman in 2012

The 2012 issuing programme is not available.
  1. Om021.12-80
    Wns Number
    OM021.12
    Country / Post
    Oman
    Date of Issue
    December 12, 2012
    Subject
    Arabian Horses - Ajlad
  2. Om022.12-80
    Wns Number
    OM022.12
    Country / Post
    Oman
    Date of Issue
    December 12, 2012
    Subject
    Arabian Horses - Modheeah
  3. Om023.12-80
    Wns Number
    OM023.12
    Country / Post
    Oman
    Date of Issue
    December 12, 2012
    Subject
    Arabian Horses - Sadeed

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