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History of the manufacturer  

Gurian, Edward E. & Co, Inc; Chicago, IL

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Name: Gurian, Edward E. & Co, Inc; Chicago, IL    (USA)  
Abbreviation: gurian
Products: Model types
Summary:

Edward E. Gurian & Co, Inc; Chicago, IL, is the maker of the Sound Master tube tester.

History:

This manufacturer was suggested by Gottfried Silberhorn.


Some models:
Country Year Name 1st Tube Notes
USA  50 Sound Master Tube Tester TC5   Tube Tester and General Continuity Checker; has anybody ever found a bad tube with this de... 
USA  55 Sound Master Tube Checker TC-5   Compare with most similar model type Sound Master Tube Tester >TC5<. 

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