The most significant historical contents in this collection are the materials found in Box 1, which include photographs and a scrapbook of newspaper accounts detailing the ACWA Strike of 1933, as well as a substantial amount of material regarding the proxy battle of 1960. Box 2 contains a broad collection of general historical material about the company, such as newspaper articles, advertisements, and style model books, as well as an original Heumann patent and Heumann biographical information. Significant financial and stock information is found in Box 3, including original turn of the century bank account books, annual reports, executive payroll reports, and stockholder correspondence. Finally, Box 4 contains miscellaneous business and legal documents related to Keller, Heumann and Thompson, Inc. such as by-laws, constitutions, and minutes of meetings.