Antiques: A.J. Casson silk screen print celebrates Canada

Q  I bought this old picture at a yard sale many years ago. I think it’s a lithograph of Canada’s Coat of Arms, but I’m not sure. The bottom of the crest is signed “A.J. CASSON.” Could it be the same one of the Group of Seven? The print measures 59 by 47 cm (23 x 18.5 inches).
Jerry, Dieppe
This rare and beautiful print should be in high demand for Canada’s 150th this year, with a value of at least $650.
A.  What a way to celebrate Canada’