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Title: Exactus stylus operated adding and subtracting device, desk [Go to resource]
Description: Exactus stylus operated adding and subtracting device, desk top model License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: adding machine (stylus) Temporal: 1930-1950 Source: Science Museum Identifier: 1994-1139 Go to resource More Like this...
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