Improvement in Revolving Stereoscopes
date: label: Date made
content: January 25, 1870
name: label: maker
content: Beckers, Alexander
setName: label: See more items in
content: Work and Industry: Photographic History
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PG.000722
objectType: label: Object Name
content: Patent Model, Stereoscope