Canada B.O.B. O19 Used Overprinted Official Shifted Overprint | Canada, Stamp / HipStamp
Calla stamps mark spring's beginning with special CAPEX overprint - Canadian Stamp News
Lot 94 Canada 12½c Queen Victoria VF plate proof in yellow green with vertical SPECIMEN overprint in Black, on India paper, very fine – Sparks Auctions
OHMS and "G" Overprint - Moreland Revenue Stamps
Canada #EN69b Postal Sta. "Broken Frame on Overprint" variety (LR) George VI on eBid United States | 179422377
Canada Stamps 1950 SG O178 Official Overprint G
Canada CO2 - Mint 7¢ Goose Official G overprint Air Mail VF-NH – Durbano Stamps
Canada Stamps 1955 SG O203 Official Overprint G Fine Mint Scott O41