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'Locke adder', 1901. Locke adder calculatin

'Locke adder', 1901. Locke adder calculatin
3 4 c m
40cm
actual image size: 32cm x 26cm

Description

Locke adder', 1901. Locke adder calculating device made by C E Locke Manufacturing Company, kensett, Iowa.

Image Details

Image Ref.
 
10328812

© Science Museum / Science & Society Picture Library

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