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Title: Layton's improved arithmometer no.1624, capacity 7 x 7 = 12 [Go to resource]
Description: Layton's improved arithmometer no.1624, capacity 7 x 7 = 12 figures, with instruction sheet License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: calculating machine (stepped drum) Temporal: 1900-1920 Source: Science Museum Creator: Layton Identifier: 1962-211 Go to resource More Like this...
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