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.

CA053.04

Country / Post Canada
Date of Issue 20 December 2004
Primary theme National symbols (Flags)
Geography & Meteorology (Waterfalls)
Subject Canadian flag
Width 20.0 mm
Height 24.0 mm
Denomination 0.50 CAD
Number in set 5 (show set)
Layout/Format self adhesive booklet of 10 of 5 designs
Perforations imperforate
Stamp issuing authority Canada Post
Printer Canadian Bank Note
Contact the issuing stamp authority