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Tangent Sight
anonymous, c. 1845 - c. 1858, demonstration model, NG-MC-703
Tangent Sight
anonymous, 1845 - 1865, demonstration model, NG-MC-1889-30
Gun Sight
anonymous, c. 1860 - c. 1870, demonstration model, NG-MC-1889-26
Model of a Propeller
anonymous, anonymous, c. 1855 - c. 1860, demonstration model, NG-MC-564-2
Tangent Sight
anonymous, c. 1864, tangent sight, NG-MC-1164