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.

LK010.11

Country / Post Sri Lanka
Date of Issue 18 February 2011
Primary theme Education (Schools)
Subject 125th Anniversary of Southlands College, Galle
Width 60.0 mm
Height 30.0 mm
Denomination 5.00 LKR
Number in set 1
Layout/Format sheet of 50
Perforations 14 by 13.5
Stamp issuing authority Department of Posts
Printer Department of Government Printing, Sri Lanka