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.

LK005.06

Country / Post Sri Lanka
Date of Issue 6 January 2006
Primary theme Engineering
Subject 100th Anniversary of The Institution of Engineers
Width 25.0 mm
Height 30.0 mm
Denomination 5.00 LKR
Number in set 1
Layout/Format sheet of 100
Perforations 13.5 by 12
Stamp issuing authority Department of Posts
Printer Department of Government Printing, Sri Lanka
Connect to the web shop of the issuing stamp authority