Roy Ehrhardt Research
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
unitdate: label: Date
content: circa 1850s-1990
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
identifier: label: Identifier
content: NMAH.AC.1122, Subseries 7.2
objectType: label: Type
content: Archival materials
scopecontent: label: Scope and Contents
content: Research gathered by Roy Ehrhardt and his collaborators that would inform their writing for Price Guides. This shows his and others' research methodology. A collaborative effort between multiple horological specialists to what would become watch encyclopedias of multiple editions. Much of the research focuses on an ambitious project to recreate a serialized list of watches created by the United States Watch Company based on a limited number of known watches.