Original Patentschrift - G. Niven in Shiantelle , Streatham , 1894, Machine for adding, arithmetic, computing machine !!

Original Patentschrift - G. Niven In Shiantelle , Streatham , 1894, Machine For Adding, Arithmetic, Computing Machine !! - Tools
Original Patentschrift - G. Niven In Shiantelle , Streatham , 1894, Machine For Adding, Arithmetic, Computing Machine !! - Tools
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