[Arran]

The flowers are a water transfer decal, I've seen those on a homemade doll cradle recently. There was a model 511 for sale in Victoria a year or two ago, and it had been repainted much more crudely, even though the seller claimed it was all original. There was at least one business in the Vancouver area that was importing, and reselling used radios from the U.S back in the 1940s, I have a Silvertone set with their decal on the back, so it may or may not have been sold in Canada originally. 
Regards
Arran