Comptometer Model B, 1/20 Fraction
date: label: date made
content: 1908
name: label: maker
content: Felt & Tarrant Manufacturing Company
notes: label: Description
content: This full-keyboard non-printing adding machine has a metal top and mechanism, eight columns of color-coded octagonal plastic keys with complementary digits indicated, and a zeroing crank on the right side. The second column of keys from the right has only one key in it. The keys are alternately concave (odd digits) and flat (even digits). Nine rows of number wheels in front of the keyboard indicate the result. The second number wheel from the right has only zeros and ones on it. The sides and base of the machine are missing. It is marked on a metal tag screwed to the top at the back: TRADE COMPTOMETER MARK. The last patent date on the tag is: AUG.9.04.
label: Description
content: This is a forerunner of the Model C Comptometer for British currency (MA.323652).
label: Description
content: Reference:
label: Description
content: Felt & Tarrant, Accession Journal 1991.3107.06.
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, Chicago
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Adding Machines
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Victor Comptometer Corporation
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.323653
label: catalog number
content: 323653
label: accession number
content: 250163
objectType: label: Object Name
content: adding machine
physicalDescription: label: Physical Description
content: wood (overall material)
label: Physical Description
content: metal (overall material)
label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: 14.5 cm x 24 cm x 36 cm; 5 23/32 in x 9 7/16 in x 14 3/16 in