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.

RS021.08

Country / Post Serbia
Date of Issue 23 May 2008
Primary theme Geography & Meteorology (Seas, lakes & rivers)
Subject European Nature Protection - Lake of Vlasina
Width 35.0 mm
Height 29.0 mm
Denomination 20 CSD
Number in set 2 (show set)
Layout/Format sheet of 8
Perforations 13.25 by 13.25
Stamp issuing authority Jugomarka
Printer Forum Novi Sad