England or France
Wood, metal, and glass; H. 36.6 in. (93.0 cm), W. 40.55 in. (103.0 cm), D. 14.17 in. (36.0 cm)
Bakken Library and Museum (Minneapolis, Minn.), 81.64
Franklin designed more than one armonica. To each he added changes or improvements based on his continuing experience with the instrument.