John C. Haynes & Co.

John C. Haynes & Co., a significant American maker of a wide variety of musical instruments in the late 19th century.

By early in the 20th century, the company was no longer making instruments; it had become a retail store selling pianos and instruments under the Ditson name.

References

(1) http://www.boston.com/news/local/massachusetts/articles/2005/05/01/fyi/ - Boston Globe article on the creation of the John C. Haynes & Co. by Oliver Ditson

(2) http://peterhadams.com/ - a comprehensive list of musical equipment maker catalogs, including five for John C. Haynes & Co.