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| In the second workshop Francis Massen shows how to calculatate with Brunsvga 13RK mechanical calculators from the 1950's. | |
| Total images: 11 | Help | |
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| In the second workshop Francis Massen shows how to calculatate with Brunsvga 13RK mechanical calculators from the 1950's. | |
| Total images: 11 | Help | |