[Arran]

Mike;
Are those 1 Watt ones the Vishay ones that are the same size as a 1/2 Watt carbon resistor, I think that Bob Andersen was using those in his TV sets as they had a reddish brown paintjob? I do know that they are the better ones to use if you want to replicate a Dogbone style resistor, as they would be more heat tolerant and less likely to fail inside the reproduction casing.
Anyhow I had one of these Silvertones years ago, also brown Bakelite, they were sold through Simpson's, Eaton's arch rival in the catalog business, back in the mid 1950s. The cabinet on mine was broken, but it did perform well, though I think it was missing the knobs. I eventually parted it out as it was not worth trying to restore, I still have the dial stashed away, likely the IF cans too, and the speaker was used in something else that I fixed up. I agree that the U.S ones were made by Arvin, but I'm not sure if Arvin had a branch plant in Canada or not at that time, or if they were made under license, or imported directly from Arvin in the U.S.
Regards
Arran