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.

LK002.11

Country / Post Sri Lanka
Date of Issue 21 January 2011
Primary theme Medicine (Famous Medical people)
Subject Centenary of Birth of Dr P.R. Anthonis
Width 30.0 mm
Height 41.0 mm
Denomination 5.00 LKR
Number in set 1
Layout/Format sheet of 100
Perforations 13.5 by 14
Stamp issuing authority Department of Posts
Printer Department of Government Printing, Sri Lanka