Canadian Philately - The Stamps and Postal History of Canada 1851 to Present by Brixton Chrome

My apologies for being late with this week's post. I had a computer hardware disaster yesterday that saw me lose most of my data, and I spent most of yesterday trying to recover it, without any success I might add. So, I did not get a change to write this week's post until today.

Today, I delved into the last 17 stamps of 1970, 12 of which came from the Christmas issue. These issues were replete with varieties that are not listed in Unitrade, such as:


A distinct smooth/ribbed paper distinction that is found on all of the issues except for the Alexander Mackenzie issue and the Oliver Mowat issue. Additional plate flaws on the Christmas issue 5c and 6c stamps.A double print of the Canada inscription on the Group of Seven issue. Three or more varieties of paper fluorescence for nearly all the stamps listed.Shade varieties on several of the Christmas stamps and the Group of Seven issue. In addition, there are the usual variations in perforation on the stamps printed by CBN, which …

Today, I began my examination of the stamps of the 1970's with the first 10 stamps of 1970. This is one of the supposedly simpler periods according to Unitrade, with no varieties other than the basic Winnipeg tagged versions of the commemoratives being listed. 
In contrast to the previous two years, in which most of the stamps are printed on fluorescent papers, this is the first time in two years that the vast majority of the 10 stamps are printed on dull fluorescent papers, with only one issue being issued on high fluorescent paper. Despite the relatively simple appearance, it turns out that most of the issues have upwards of 6 different varieties of dull fluorescent paper. There are also the usual variations in perforation on the CBN printed stamps. When these two factors are combined, there is quite a bit more collecting scope than one would expect at first glance. 
There are not really much shade varieties to collect, nor are there any constant varieties known at the current …