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 GR023.18

  1. Gr023.18-80
    Wns Number
    GR023.18
    Country / Post
    Greece
    Date of Issue
    June 15, 2018
    Subject
    190 Years since the Establishment of the Hellenic Army Academy - Logo of the Hellenic Army Academy
  2. Gr024.18-80
    Wns Number
    GR024.18
    Country / Post
    Greece
    Date of Issue
    June 15, 2018
    Subject
    190 Years since the Establishment of the Hellenic Army Academy - Ioánnis Kapodístrias awards a decoration to a cadet
  3. Gr025.18-80
    Wns Number
    GR025.18
    Country / Post
    Greece
    Date of Issue
    June 15, 2018
    Subject
    190 Years since the Establishment of the Hellenic Army Academy - Lowering the Flag in the Hellenic Army Academy
  4. Gr026.18-80
    Wns Number
    GR026.18
    Country / Post
    Greece
    Date of Issue
    June 15, 2018
    Subject
    190 Years since the Establishment of the Hellenic Army Academy - The new building of the Hellenic Army Academy