United States Testing Company Inc. undated (toy testing instruments)
name: label: Collection Creator
content: Duncan, Donald F., Jr.
label: Collection Creator
content: Duncan Yo-Yo Company.
setName: label: See more items in
content: Duncan Family Yo-yo Collection
label: See more items in
content: Duncan Family Yo-yo Collection / Series 2: Playmaxx / 2.13: Miscellaneous
container: label: Container
content: Box 16, Folder 5
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials