The International Association of Machinists and Aerospace Workers Artifact collection comprises a wide variety of artifacts, including charters, photographs, paintings, posters, banners, certificates, and tool kits, 1888-circa 2000. The items were created or received by IAMAW's officers, headquarters, and local lodges. The collection includes the contents of the "Time Capsule of 1955" placed in the cornerstone of the union's then headquarters.