86-40368, Signal, Ball type
name: label: Collection Donor
content: Hall, Clayton M.
setName: label: See more items in
content: Clayton M. Hall Collection of Railroad Photographs
label: See more items in
content: Clayton M. Hall Collection of Railroad Photographs / Series 1: Photographic Negatives
unitdate: label: Date
content: 1949
container: label: Container
content: Box 2
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials
label: Type
content: Negatives