|Superior Electronics Industries Ltd of Montreal, Quebec, Canada is what it says on the tube box. Doesn't tell us a lot. In researching the brand it appears that they provided stock to department stores and other outlets. Tubes were probably the best deal they could make whether top-notch or grade B's. They were definitely not related to the well-known US manufacturer of tube testers and other test equipment.
Tube box courtesy of Damon Limeback
A Story For Our Time|
A Tale of Courage and Grit ~ With a Twist
|A Rousing Adventure|
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