United States Watch Company, Known Serial Numbers
setName: label: See more items in
content: Jon and Jennifer Hanson Watch and Clock Collection
label: See more items in
content: Jon and Jennifer Hanson Watch and Clock Collection / Series 7: 2017 Addenda / 7.2: Roy Ehrhardt Research
unitdate: label: Date
content: 1986
container: label: Container
content: Box 23, Folder 4
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials