Winnipeg Tagging on the 1967-1973 Centennial Issue
Today's post will be the first of two posts that will explore the tagging that is found on many stamps of this issue. Collectors with even a passing familiarity with this issue will know that there were two basic types of tagging used on this issue: Winnipeg tagging and Ottawa tagging. Today's post will look at the first of these in depth: Winnipeg tagging. The Winnipeg tagging was first introduced in 1962, and so was in use on all printings of the low values from 1967 until 1972 when Ottawa tagging began to replace it. Interestingly, the tagging was not introduced on the high values until December 9, 1969.
Tagging is of course, a chemical overprint that was applied to the surface of the stamps after printing. Like any overprint, there are several attributes which can show variation, and are worthy of study:
The chemical makeup of the taggant compound used, as evidenced by its reaction under UV light.How much taggant was applied, as evidenced by how visible the tagging is to t…
Tagging is of course, a chemical overprint that was applied to the surface of the stamps after printing. Like any overprint, there are several attributes which can show variation, and are worthy of study:
The chemical makeup of the taggant compound used, as evidenced by its reaction under UV light.How much taggant was applied, as evidenced by how visible the tagging is to t…
