File:Wireless Manufacturing Company ad from the March 1916 QST.png
![File:Wireless Manufacturing Company ad from the March 1916 QST.png](https://upload.wikimedia.org/wikipedia/commons/thumb/e/ef/Wireless_Manufacturing_Company_ad_from_the_March_1916_QST.png/740px-Wireless_Manufacturing_Company_ad_from_the_March_1916_QST.png?20090809213526)
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