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 in 2018 with theme "Painting"

  1. Aw032.18-80
    Wns Number
    AW032.18
    Country / Post
    Aruba
    Date of Issue
    October 30, 2018
    Subject
    Personalized Stamps - National Museum 2018 (Rijksmuseum) - Willem Kalf (1655-1660)
  2. Aw033.18-80
    Wns Number
    AW033.18
    Country / Post
    Aruba
    Date of Issue
    October 30, 2018
    Subject
    Personalized Stamps - National Museum 2018 (Rijksmuseum) - Willem Kalf (1655-1660)
  3. Aw034.18-80
    Wns Number
    AW034.18
    Country / Post
    Aruba
    Date of Issue
    October 30, 2018
    Subject
    Personalized Stamps - National Museum 2018 (Rijksmuseum) - Willem Kalf (1655-1660)