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.

CA085.18

Country / Post Canada
Date of Issue 20 August 2018
Primary theme Fauna (Owls)
Subject Birds of Canada Part 3 - Snowy Owl (Bubo scandiacus) (Quebec)
Width 20.0 mm
Height 24.0 mm
Denomination Permanent
Number in set 10 (show set)
Layout/Format self adhesive booklet of 10 of 5 designs
Perforations 14 by 14
Stamp issuing authority Canada Post
Printer Canadian Bank Note
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