According to Cooks' Rogers book,there was a difference between the strainer on the Dyna and the Powertone. The Dyna had a deeper notch in the lower left portion of the cam and tension screw assembly and is identified by a "D" stamped into the front on the casing that houses the screw. ( The Rogers Book page 125)
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And those who were seen dancing were thought to be insane by those who could not hear the music ~ F. Nietzsche
