The Dunwoodie Collection is the life research of Ralph Harold Dunwoodie, focusing on trucks and bus manufacturers through the years. The folders are organized alphabetically by manufacturer, then chronologically by production year. Folders are marked in the top left corner with either a "T" for truck or "B" for bus.
Peterbilt Motors build record collection spans from 1939 to 1971, totaling 57,000 records. The collection includes kits from 1961 to 1971 and trucks from 1939 to 1971.