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History of the manufacturer  

Defender (tubes) - see also Sears; Chicago, IL

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Name: Defender (tubes) - see also Sears; Chicago, IL    (USA)  
Abbreviation: defender
Products: Brand
Summary:

Defender is a brand of tubes sold by Sears, Roebuck & Co.

Their catalog number for the UX201A tube is 6505. Different coloured boxes for the tubes were marketed at dfferent times in the late 1920's.

History:

This manufacturer was suggested by Fin Stewart.


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