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  DSC01592.JPG - The TIM machines were built by Ludwig Spitz, a former sales manager for the Burkhardt und Saxonia Rechnemaschinen company. Staring 1907, he designed and built the TIM and UNITAS line of calculators. This wooden case model was built from 1907 to 1909 (see here</a).  
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The TIM machines were built by Ludwig Spitz, a former sales manager for the Burkhardt und Saxonia Rechnemaschinen company. Staring 1907, he designed and built the TIM and UNITAS line of calculators. This wooden case model was built from 1907 to 1909 (see here Download
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