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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

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.


This manufacturer was suggested by Fin Stewart.