Addiator Duplex
date: label: date made
content: ca 1955
name: label: maker
content: Addiator G.m.b.H.
notes: label: Description
content: This notched band adder is made of steel painted black, gold, and white. It has a steel stylus and a brown leather case. The front of the instrument has eight columns of numbers with a band under each column. A hook at the top of each column allows carrying and a ninth band allows carrying from the eighth column. Sums as large as nine digits are displayed in round openings above the columns. On the back are eight columns of numbers for doing subtraction. A zeroing bar extends across the bottom of the back (the top of the front).
label: Description
content: The firm of Carl Keubler produced adders under the name "Addiator" in Berlin (later West Berlin) from 1920 until the 1980s. This is one of three versions of the Addiator in the Smithsonian collections.
label: Description
content: Reference: Martin Reese, <I>Historische Buerowelt</I>, 43 (September 1995).
label: Location
content: Currently not on view
place: label: place made
content: Germany: Berlin, Berlin
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Adder
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Myron R. Smith
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1989.0325.01
label: accession number
content: 1989.0325
label: catalog number
content: 1989.0325.01
objectType: label: Object Name
content: adder in case
physicalDescription: label: Physical Description
content: steel (overall material)
label: Physical Description
content: leather (overall material)
label: Measurements
content: overall: .5 cm x 8 cm x 12.7 cm; 3/16 in x 3 5/32 in x 5 in