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.

LK001.09

Country / Post Sri Lanka
Date of Issue 2 February 2009
Primary theme Environment & Conservation
Geography & Meteorology (Seas, lakes & rivers)
Flora (Trees)
Subject Madu Ganga Ramsar Wetland
Width 41.0 mm
Height 30.0 mm
Denomination 5.00 LKR
Number in set 2 (show set)
Layout/Format sheet of 100
Perforations 12 by 12
Stamp issuing authority Department of Posts
Printer Department of Government Printing, Sri Lanka