Canadian Stamps and Postal History

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Ottawa Tagging on The 1967-1973 Centennial Issue

Ottawa Tagging on The 1967-1973 Centennial Issue

Today's post examines the Ottawa tagging on the 1967-1973 Centennial Issue of Canada. Specifically covered are the tagging widths, spacings between bars, colour under UV light, and differences between OP-4 and OP-2 tagging.
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