Canadian Stamps and Postal History
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...
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...