Unitrade again lists some nice varieties for the 1970 Christmas Series that I have found in my own collection.
The first I have is Scott #522.
The Variety, listed as Unitrade #522iii is a “dot” between M and A in the word Christmas. Unitrade values this at $20.
Here is a closeup of the dot
The second one I have is of Scott #525
The variety, known as the “Scratch Through Window” variety is listed in Unitrade as #525iii. Unitrade values this at $2.00
And the closeup:
There are other listed varieties for this series as well for number 523, and 528 which I unfortunately do not have.