The Centennial Issue of 1967-1973 The Broad Overview
Today marks the first in a series of many posts about what has become not only one of the most popular definitive issues for Canadian specialists, but in the world. It is on a par with the Machin Heads of the United Kingdom, in terms of complexity, for the six years that it was current. The Machin Heads are of course, much more extensive, having been in continuous use for 50 years now, but the Centennial Issue is remarkably complex for a series that lasted for only six years. Five to six years is the average life span of a modern definitive issue, but usually most definitive issues that run this long do not yield anywhere near the number of collectible varieties that this one does. This is one of those issues that you can collect for 40 years, and think at the end of that time that you know it inside and out, and just when you think you have discovered all that there is to discover, another aspect that you either didn't consider to be significant, or just didn't notice will su