This machine is listed in Legros' 1908 paper " Typecasting and Composing Machinery," but I have come to believe that it never really existed.
In his 1908 paper, Legros has a paragraph on page 1074 describing the Ballou machine. He then says:
Eight years later, in their monumental volume Typographical Printing Surfaces , Legros and Grant repeat the same paragraph on the Ballou, and continue:
"A similar machine known as the Dedrick was introduced about 1899. It was arranged to operate successively on four matrices."
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