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.

KH005.03

Country / Post Cambodia
Date of Issue 25 April 2003
Primary theme Architecture
Economy & Industry (Economic Aid)
Subject Japanese Grant Aid
Width 30.0 mm
Height 45.0 mm
Denomination 3500 KHR
Number in set 5 (show set)
Layout/Format sheet
Perforations 13 by 13
Stamp issuing authority Cambodia Post
Printer Postal Stamp Printing Enterprise