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.

RS001.11

Country / Post Serbia
Date of Issue 31 January 2011
Primary theme Geography & Meteorology (Artic and Antarctica)
Environment & Conservation (Global Warming)
Subject Preserve the Polar Regions and Glaciers
Width 37.5 mm
Height 30.0 mm
Denomination 46 CSD
Number in set 2 (show set)
Layout/Format miniature sheet of 2 of 2 designs
Perforations 13.25 by 13.25
Stamp issuing authority Public Enterprise of PTT Srbija
Printer Zin Belgrade