Rubuta ci gaba don wannan sakin layi - Carlsfelder concertina () memba ne na dangin concertina na Jamus wanda Carl F. Zimmerman ya haɓaka, bisa ga farkon concertina na Chemnitzer na Carl Friedrich Uhlig. Zimmerman, ɗan asalin Carsfeld, Saxony, ya gabatar da kayan aikinsa a baje kolin masana'antu na shekara ta 1849 a Paris, da baje kolin masana'antu na shekara ta 1851 a London, da kuma baje kolin masana'antu na dukan al'ummai na shekara ta 1853
a birnin New York. Zimmerman ya faɗaɗa Uhlig's farkon 1- da 2-row square concertinas, yana haɓaka kayan aikin bisonoric mai layi 3, daga ƙarshe ya sayar da kasuwancinsa ga mai ƙirar kayan aiki Ernst Louis Arnold kuma ya yi ƙaura zuwa Amurka, inda daga baya ya zama sananne ga kayan aikin kirtani, da autoharp.