This folder contains correspondence and other documents relating to the business affairs of various regional sales companies under contract with the North American Phonograph Co. Many of the letters are by local company officials seeking to purchase phonograph components or offering suggestions about technical improvements. At the end of the folder is a nationwide list of local phonograph companies. A few of the documents may be partially illegible due to water damage.

Approximately 50 percent of the documents have been selected. The following categories of documents have not been selected: routine letters from local companies regarding leasing, foreign sales, exhibits, requests for Edison's portrait, and other matters; routine letters relating to Alfred O. Tate's role as chairman of the National Phonograph Association's Committee on Batteries; lists of phonograph serial numbers; documents that duplicate information in selected items.