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.

LK002.07

Country / Post Sri Lanka
Date of Issue 7 February 2007
Primary theme Architecture (Classical)
Subject 50th Anniversary of Sri Lanka - China Diplomatic Relations
Width 60.0 mm
Height 25.0 mm
Denomination 50.00 LKR
Number in set 1
Layout/Format sheet of 50
Perforations 13.8 by 13.8
Stamp issuing authority Department of Posts
Printer Department of Government Printing, Sri Lanka