The collection contains records of Clyde Iron Company (1889), Northwestern Supply Company (1899), Northwestern Manufacturing Company (1899), Clyde Iron Works, Cleveland Duluth Company, Inc. (1920), Willamette Clyde Company (Oregon, 1923), Cleveland Duluth Holding Company of Minnesota (1926) and Clyde Iron Works Sales Company (renamed Clyde Sales Company) the sole distributor for Clyde Iron Works. There are no records of the Clyde Equipment Company.

The collection contains articles of incorporation, by-laws, minutes, annual reports, budgets, policies, newsletters, newspaper clippings scrapbooks, photographs, Chisholm family genealogy and photographs, museum programming materials and photographs, American Alliance of Museums museum assessment, strategic plan.

Contains financial records, minutes, committee records, reports, Annual Duluth Day materials, and other records.

The collection contains minutes, financial books, annual reports, publications, maps, miscellaneous correspondence, news clippings, photographs, timetables, and microfilmed scrapbooks. Financial records represent the largest portion of records, and there is a significant lack of executive records.

The collection consists of certificates of incorporation and by-laws and a history of the company; minutes 1908-1910; titles, leases, deeds 1887-1959; contracts, correspondence and minutes; stock ledgers 1902-1913; financial statements and balance sheets 1919-1944, 1945-1957; personnel 1956; appraisal 1917; and one black and white photograph of the buildings.

The collection contains personal and financial correspondence, letterpress books, scrapbooks, newspaper clippings, manuscripts written about local and family history, financial records, legal papers, maps, photographs, one audio cassette of an interview, and reference materials.

The collection contains corporate and financial records and minutes; job site and construction records; publicity records; and oversized photos and blueprints.