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.

MN020.17

Country / Post Mongolia
Date of Issue 6 July 2017
Primary theme Fauna (Owls)
Subject Owls of Mongolia - Northern Hawk-Owl (Surnia ulula)
Width 40.0 mm
Height 30.0 mm
Denomination 500 MNT
Number in set 4 (show set)
Layout/Format miniature sheet of 4 of 4 designs
Perforations 12 by 12
Stamp issuing authority Postage Stamp Authority of Mongol Post
Printer Beijing Stamp Printing House of State Postal Bureau
Connect to the web shop of the issuing stamp authority