The smallest crystal wireless set ever produced has been made by a London firm. It is caller] “The Butterfly,” and is mounted on an ordinary finger ring. The base is only lin long by Jin wide. The diminutive proportions of the set by no mean's impair the efficiency, for four pail's of headphones distinctly picked up music 40 mil«a »nu.
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Bibliographic details
Otago Daily Times, Issue 19041, 11 December 1923, Page 7
Word Count
60Page 7 Advertisements Column 5 Otago Daily Times, Issue 19041, 11 December 1923, Page 7
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