Description1917 American Marconi advertisement.jpg
English: Advertisement for the Marconi Wireless Telegraph Company of America which appeared on page vi of the 1917 edition of "The Year-book of Wireless Telegraphy & Telephony
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Advertisement for the Marconi Wireless Telegraph Company of America which appeared on page vi of the 1917 edition of "The Year-book of Wireless Telegraphy & Telephony
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