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Snail pieces for Scheutz Difference Engine

Snail pieces for Scheutz Difference Engine

1859
Snail pieces for Scheutz Difference Engine

Snail pieces for Scheutz Difference Engine

1859
Two snail pieces for Scheutz difference engine, made by Bryan Donkin & Co. in 1859

Snail pieces for Scheutz Difference Engine

1859