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Model of a Caisson
anonymous, c. 1802, scale model, NG-MC-14
Tangent Sight
anonymous, 1845 - 1865, demonstration model, NG-MC-1889-24-B
Tangent Sight
anonymous, c. 1845 - c. 1858, demonstration model, NG-MC-703
Gun Sight
anonymous, c. 1860 - c. 1870, demonstration model, NG-MC-1889-26