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:
"A similar machine known as the Dietrich was introduced about 1899. It was arranged to operate successively on four matrices."
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."
It would seem that "Dietrich" is merely an error in the 1908 paper for "Dedrick."
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