This is a known variety. It is Unitrade Canada Specialized Catalogue #726ii for the double albino imprint. With the reverse embossing, you can easily see that not only has the black imprint shifted well to the left from the raised lettering, but there is visible doubling of the lettering where the "ALBINO" print has occurred. These are the best pictures I could get today in the snow clouds (no light). I will try for better pics tomorrow.

I have adjusted this one so you can see the imprint better.

There is also one like this for sale....
http://www.armstrongsstamps.ca/efospecials.htm