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History of the manufacturer  

International (tube brand)

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Name: International (tube brand)    (USA)  
Abbreviation: internatio
Products: Brand

Tyne's "Saga of the Vacuum Tube" lists International on page 357: "Manufacturer's name not available but they made rectifier tubes".

An International B3 half wave mercury rectifier tube has been located, as well as other (non-rectifier) tube types.


This manufacturer was suggested by Fin Stewart.