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.

CA062.11

Country / Post Canada
Date of Issue 3 October 2011
Primary theme Science & Technology (Physics & chemistry)
Subject International Year of Chemistry
Width 32.0 mm
Height 24.0 mm
Denomination P
Number in set 1
Layout/Format self adhesive booklet of 10
Perforations 13.5 by 13.5
Stamp issuing authority Canada Post
Printer Lowe-Martin
Contact the issuing stamp authority