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Tangent Sight
anonymous, 1845 - 1865, demonstration model, NG-MC-1889-24-B
Rotary Pump
anonymous, c. 1850 - c. 1858, test model, NG-MC-650
Tangent Sight
anonymous, c. 1845 - c. 1858, demonstration model, NG-MC-703
anonymous, 1845 - 1865, demonstration model, NG-MC-1889-24-B
anonymous, c. 1850 - c. 1858, test model, NG-MC-650
anonymous, c. 1845 - c. 1858, demonstration model, NG-MC-703