I was raised in Kitchener Ont. (home of Electrohome) . To my knowledge most of their stuff was manufactured there. The Planar stuff was their last kick at the rapidly changing can of electronics (they had missed the boat by aligning their electronics with their cabinet making division (consoles) in the 70's. Deilcraft (the cabinet making wing) actually went furniture only for a bit to try to survive. I believe Planar was the last ditch effort at trying to have their home electronics division survive as well. Many local stories about everything on the halted production line being sold of at cents on the dollar. Many people got units and parts to assemble many more units. They were well made but never made their mark.
As an aside : the area has a strong, but not well known, history of consumer electronics : it is where Paul Barton (Psb) was raised and started out , Marsland , Cambridge speakers and many more. I'd put the unit as pre '75