This metronome was made by Franz Manufacturing Co. in New Haven, Connecticut, around 1940-1950. It an electric metronome, model LM-2, made of bakelite, with a metal and bakelite dial for selecting speed of 40 to 208 beats-per-minutes.
This metronome features U. S. Patent #2150967, dated March 21. 1939, by Frederick Franz for an electrically driven metronome.
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