This collection consists mainly of film negatives, photographs, some copy prints, and subject files collected and generated by Sam Breck, mostly of railroads, locomotives, depots, towns, historic buildings, both public and private, bridges, freighters or barges, railroad logos, and waterfront scenes in Michigan, but also including Ohio, Indiana, Pennsylvania, New York (state), Ontario, Canada, and some 1942 images of the mountains and wilderness of Colorado. There are a few images of people, including members of a band, and a downtown art show. The collection is organized by format and topic as much as possible. Several folders of negatives are unidentified and undated. The collection is in good physical condition.
Published materials donated with the collection were separately cataloged.
A photograph collection of Samuel L. Breck, 1960s-1980s, is housed at the Bentley Historical Library, University of Michigan.