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 BG008.18

  1. Bg008.18-80
    Wns Number
    BG008.18
    Country / Post
    Bulgaria
    Date of Issue
    April 25, 2018
    Subject
    EUROPA 2018 - Bridges
  2. Bg009.18-80
    Wns Number
    BG009.18
    Country / Post
    Bulgaria
    Date of Issue
    April 25, 2018
    Subject
    EUROPA 2018 - Bridges