Chronograph
date: label: date made
content: after 1924
name: label: maker
content: Gaertner Scientific Corporation
notes: label: Description
content: This type of chronograph was apparently developed around the time of World War II and used for such purposes as radio acoustic ranging. The inscription reads "GAERTNER - Gaertner Scientific Corporation - Serial number 148. S. Chicago, U.S.A." William Gaertner & Co. began making precision scientific instruments in Chicago in 1896. The firm became the Gaertner Scientific Corp. in 1924.
label: Description
content: Ref: U.S. Coast & Geodetic Survey, <i>Hydrographic Manual</i> (1947), pp. 632-633.
label: Location
content: Currently not on view
place: label: place made
content: United Kingdom: England, London
label: place made
content: United States: Illinois, Chicago
setName: label: See more items in
content: Medicine and Science: Physical Sciences
creditLine: label: Credit Line
content: U.S. Naval Observatory
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.327722
label: catalog number
content: 327722
label: accession number
content: 283654
label: serial number
content: 148.S
objectType: label: Object Name
content: chronograph
physicalDescription: label: Measurements
content: overall: 17 in x 12 in x 8 1/2 in; 43.18 cm x 30.48 cm x 21.59 cm
label: Measurements
content: overall: 11 13/16 in x 16 13/16 in x 8 1/2 in; 30.00375 cm x 42.70375 cm x 21.59 cm