Scale: Unknown. A midship model showing a proposed method of hull construction with double-rigged iron frames and wooden planking. The model is made largely in wood with a planked hull and wooden frames to the upperworks. Two decks are depicted in frame, the main deck having a large hatch with a wooden edge. The deck beams are composite with wooden beams sandwiched between metal beams and with metal diagonal bracing. The deck below is identical in terms of composition and layout, but without the diagonal bracing. Two slender metal supports run vertically at either end of the section, fore and aft of the hatches, and terminating at the keelson. A paper label has been applied to the edge of the main deck hatch frame marked "15".