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Artifact Details

Title

The Adder

Catalog Number

102682869

Type

Physical object

Description

The Adder machine. Larger front circular plate reads "The Adder C. H. Webb". The smaller circular plate reads "PAT'D NOV. 5th 12th 1889"

Date

1891

Manufacturer

Webb, C. H.

Identifying Numbers

Other number

PAT'D NOV. 5th 12th 1899

Date patented

Dimensions

overall: 7 1/4 in x 10 in x 4 1/2 in

Category

Calculator/mechanical