prism binoculars
date: label: date made
content: 1944
name: label: maker
content: Bausch & Lomb
notes: label: Description
content: This is a heavy metal instrument with black finish, and barrels covered with black leather. The objective lenses are 50 mm diameter. The eye end of the left prism housing is marked “7 x 50.” That on the right is marked “U.S. MARINE CORPS / MARK 46. NO. 14209, 1944” and “BAUSCH / & LOMB / OPT. CO. / ROCHESTER / N.Y. U.S.A.” The leather case is marked “BAUSCH / & LOMB / OPT. CO. / ROCHESTER / N.Y. U.S.A.”
label: Description
content: The “DES. PAT. 83934” inscription on the eye end of the central pivot refers to the design patent that was issued to Otto Trautmann in 1931 and assigned to Bausch & Lomb. The pivot is also inscribed “BU 97.”
label: Description
content: A removable filter plate for the eye end is marked “V.D. FILTER / (INFRA-RED) / USMC-44 / BECK-LEE CORP.” V.D. stands for variable density. Beck-Lee was a medical supply firm in Chicago.
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, Rochester
topic: label: related event
content: World War II
setName: label: See more items in
content: Military and Society: Armed Forces History, Naval
label: See more items in
content: Military
creditLine: label: Credit Line
content: Department of the Navy. U.S. Marine Corps
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: AF.463127(3)
label: catalog number
content: 463127(3)
label: accession number
content: 180599
objectType: label: Object Name
content: Binoculars
label: Object Name
content: prism binoculars
label: Object Type
content: binoculars
label: Other Terms
content: Binoculars; Marine Corps; Warrant Officer; Field
physicalDescription: label: Measurements
content: overall: 10 in x 9 in x 4 in; 25.4 cm x 22.86 cm x 10.16 cm