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  092_PRODUX_Record.JPG - The PRODUX series of sliding rod calculators are cheap devices made from thin metal foil. This RECORD model has two series of slots: the upper part is for substraction (movement downwards), the lower for addition (movement is up). The stylus is not an original.  
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The PRODUX series of sliding rod calculators are cheap devices made from thin metal foil. This RECORD model has two series of slots: the upper part is for substraction (movement downwards), the lower for addition (movement is up). The stylus is not an original. Download
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