patent model, Haskins duplex telegraph, US #154479
date: label: Date made
content: 1874
name: label: maker
content: Haskins, Charles H.
notes: label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.308877
label: catalog number
content: 308877
label: patent number
content: 154479
label: accession number
content: 89797
objectType: label: Object Name
content: Telegraph, Duplex
label: Object Name
content: duplex telegraph
physicalDescription: label: Measurements
content: overall: 4 1/2 in x 7 1/2 in x 9 1/2 in; 11.43 cm x 19.05 cm x 24.13 cm