Cool, you normally don't see them with a while background and red lettering. Usually it is red background and while lettering. I also didn't know that Coca-Cola had their branded stuff made in Canada.
For a guy who can find 'everything' legal on the net, there's no info on the Waterloo plant.
So I need to get a late 40's phone book and go from there.
Sunbeam today has been through so many owners, it's like calling Fiat about a 1946 Dodge.
Lots of mention of the word 'Sunbeam' for medical/old age/disabled homes in Waterloo.
Dunno if it has anything to do with the factory.