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Model of a Portable Optical…
anonymous, 1840 - 1860, demonstration model, NG-MC-955
Model of an Anchor Release
anonymous, c. 1826, demonstration model, NG-MC-634
Model of a Wind-Driven Pump
anonymous, 1827, demonstration model, NG-MC-648-1
Model of Steering Gear
anonymous, 1820 - 1858, demonstration model, NG-MC-641