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 SI040.18

  1. Si038.18-80
    Wns Number
    SI038.18
    Country / Post
    Slovenia
    Date of Issue
    September 28, 2018
    Subject
    Fauna - Domestic Animals - Bovec Sheep
  2. Si039.18-80
    Wns Number
    SI039.18
    Country / Post
    Slovenia
    Date of Issue
    September 28, 2018
    Subject
    Fauna - Domestic Animals - Posavina Horse
  3. Si040.18-80
    Wns Number
    SI040.18
    Country / Post
    Slovenia
    Date of Issue
    September 28, 2018
    Subject
    Fauna - Domestic Animals - Brown Cow
  4. Si041.18-80
    Wns Number
    SI041.18
    Country / Post
    Slovenia
    Date of Issue
    September 28, 2018
    Subject
    Fauna - Domestic Animals - Drežnica Goat