Rotary Pump

anonymous, c. 1850 - c. 1858, test model, NG-MC-650

Support of a Tangent Sight

anonymous, c. 1860 - c. 1870, demonstration model, NG-MC-1374

Model of a Floating Beacon

Rijkswerf Rotterdam (possibly), 1845, demonstration model, NG-MC-839-2

Gauge for Priming Tubes

Marine Stoomvaartdienst, 1860, test model, NG-MC-1082

Model of a Floating Beacon

anonymous (possibly), 1845, demonstration model, NG-MC-839-1

Tangent Sight

anonymous, 1845 - 1865, demonstration model, NG-MC-1889-24-B

Tangent Sight

anonymous, 1845 - 1865, demonstration model, NG-MC-1889-30

Gun Sight

anonymous, c. 1860 - c. 1870, demonstration model, NG-MC-1889-28

Gun Sight

anonymous, c. 1860 - c. 1870, demonstration model, NG-MC-1889-26

Model of a Caisson

anonymous, c. 1802, scale model, NG-MC-14