Lachenal and 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, independent firm.

Lachenal's innovations in concertina production revolutionized the industry, and lead his company to become one of the most prolific concertina producers of the era.