Assertion: chemnitzer concertina | /r/HasProperty | bisonoric
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text: In the United States, particularly in the Midwest where there are many German and Central European descendants, the term concertina often refers to the Chemnitzer concertina, which is bisonoric and closely related to the bandoneon, but features a different keyboard layout and decorative style, including a few mechanical innovations pioneered by German-American instrument builder and inventor Otto Schlicht.:204