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History of the manufacturer  

Guaranteed Manufacturing Co.; (where?)

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Name: Guaranteed Manufacturing Co.; (where?)    (USA)  
Abbreviation: guaranteed
Products: Tube wholesaler Brand

Guaranteed Manufacturing Company

Box for tube type 245 shown on page 45 of "Radio Tubes and Boxes of the 1920's" by George Fathauer. no other information located.


This manufacturer was suggested by Fin Stewart.