While watching a video about old radios from the 1920s, a phone jack popped up. The host mentioned that phone jacks are super old and he wondered what was their origin. I always assumed they had ...
Federal Telegraph Telephone Co. type 15 phone plug. Brass plug, 2 ports on back. Molded: "Federal / Buffalo / N.Y. U.S.A. / No. 15". nmah_711498 ...
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