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Radio 1932-01

Radio1932-01.jpg Radio 1930-02ThumbnailsScientific American 1893-06-24Radio 1930-02ThumbnailsScientific American 1893-06-24Radio 1930-02ThumbnailsScientific American 1893-06-24Radio 1930-02ThumbnailsScientific American 1893-06-24Radio 1930-02ThumbnailsScientific American 1893-06-24

Ad for Triad radio tubes. Type T-247 pentode. Triad Manufacturing Co., Inc., of Pawtucket, Rhode Island.



Source: eBay sellers

Restoration by: magscanner