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Model of a Propeller
anonymous, anonymous, c. 1855 - c. 1860, demonstration model, NG-MC-564-2
Tangent Sight
anonymous, c. 1845 - c. 1858, demonstration model, NG-MC-703
anonymous, anonymous, c. 1855 - c. 1860, demonstration model, NG-MC-564-2
anonymous, c. 1845 - c. 1858, demonstration model, NG-MC-703