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Description
a & b: Two fliers with Morse Code keys, branded Offenbach & Reimus Co. (San Francisco) and M. M. Fleron & Son (Trenton, N. J.) c: "International 'Q' Signals": one page list of "Q" abbreviations and accompanying questions and answers. d: "Ships And The Sea" magazine, Winter 1959, published by Kalmbach Publishing Co. Includes article, "Not SOS, but CQD," about a rescue helped by wireless telegraphy.
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