Lachenal & Co.
Lachenal & Co. was a British firm producing concertinas from approximately 1850–1936. The firm was founded by Louis L. Lachenal (c. 1821–1861), a Swiss emigrant to the United Kingdom, who arrived there in 1839, and by 1844 was working in support of the famous Wheatstone concertina firm before founding a supporting contract firm and by 1858, an independent firm.
- Dan Michael Worrall (1 January 2009). The Anglo-German Concertina: A Social History. Dan Michael Worrall. pp. 23–. ISBN 978-0-9825996-0-0.