Proposal for Switch Control Unit, 1931-04-07
name: label: Collection Creator
content: Hamily, David
setName: label: See more items in
content: Division of Transportation: Railroads' Engineering Data
label: See more items in
content: Division of Transportation: Railroads' Engineering Data / Series 4: Philadelphia and Western Railway Company
container: label: Container
content: Box 1, Folder 4
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials