Ottawa Philatelic Society
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Canada Centennial Series 0f 1967-72
Stamps of Prince Edward Island
Transsition, Large to Small Queens
Postage Stamps of BC & VI
Stamps of Nova Scotia
Queen Victoria Diamond Jubilee Issue
King Edward VII Issue of Canada
1901 Pan-American Exposition Stamps
US Trans-Mississippi Exposition Stamps 1898i
Canadian Plate Blocks
Canada OHMS Forgery
Canada: The Burden of Proof
Postal History of West Lyne Lake Manitoba
Riddle of the Sphinx
Topical Firsts
King George V Admiral Issue of Canada
1967 Centennial Definitive Stamps
Large Queen Issue
Youth Program
Youth Resources
Transition, Large to Small Queens
October 29, 2020
Online Presentation by Guillaume Vadeboncoeur
OPS Presentation [PRINT].pdf
Adobe Acrobat Document
3.7 MB
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