This collection contains two pieces of sheet music: "Volume for Victory," the song of the A.C.F. (American Car and Foundry Company) and "Hamiltonia," song of the Hamilton Watch Company. The American Car and Foundry, Company was founded in 1899 and is still considered a leading American manufacturer of railcars and railcar parts. The Hamilton Watch Company was founded in Lancaster, Pennsylvania in 1892. Among other milestones, it produced the first electric wristwatch in 1957 and the first digital watch in 1970. The Hamilton brand is currently owned and manufactured by the The Swatch Group out of Switzerland.

Benjamin Ferris (1780-1867) and Thomas Parker (1761-1833) were both watchmakers in Philadelphia in the early nineteenth century. These are watch papers which were inserted in early timepieces and included identifying information about the watchmakers. Each paper lists the makers' Philadelphia addresses, includes a short inventory of his goods.

John T. Houlihan (1944-) is an industrial designer who worked for General Motors, SCM Corporation, General Electric, South Bend Toy, and Timex. His papers consist of sketches, drawings, and renderings from those companies, spanning nearly forty years.

Penrose Robinson Hoopes (1892-1976) was a mechanical engineer, inventor, author, and horologist. He specialized in the design of factory equipment, particularly high-production automatic machinery. This collection consists of documents pertaining to Penrose R. Hoopes' career as an engineer and inventor. Hoopes' work includes machine designs for the American Chicle Company, Campbell Soup Company, Johnson and Johnson, and the Ferracute Machine Company. The bulk of the collection material spans from 1923 to 1968, with some patent material and typescript excerpts from the eighteenth and nineteenth centuries. The collection includes correspondence and blueprints related to Hoopes' work as a designer and inventor, as well as employee records, manuscript material, photographs, trade pamphlets, and bibliographic information.