Quote:
Originally Posted by Eric H
Are you certain it's Masonite and not Bakelite? From the picture I thought it was Bakelite. If you are unfamiliar with Bakelite it's a hard brown or black Plastic like substance, tough but brittle, it will break and crack if hit or dropped hard enough but it is heat and chemical resistant.
Bakelite is Glossy from the factory but often gets dull when exposed to weather or sunlight. It can sometimes be buffed out to a shine again but once the thin shiny layer is gone it never looks as good as new.
The gunk on the knobs is some type of Mold that grows on certain types of plastic, very common on knobs from the era, it will scrub off, there are certain types of cleaner that will help remove it, someone will no doubt chime is with some suggestions, you just want to be sure you don't use anything too harsh.
Great find by the way, I've never seen that model before, Stewart Warner sets are rare in any case.
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Stewart Warner built a lot of private label products. They were a big supplier of radios to Firestone tire and pre-war models to Sears, source #100.