Scale: 1:8. A model of the after part of the wooden screw sloop HMS Rattler (1843) showing the propeller and the large aperture for raising and lowering it. The frame of the model is made in stained and varnished mahogany and on both sides an inscription has been painted which reads "HMS Rattler after part, shewing propeller and means of raising same. 1844." The two bladed propeller has been carved from wood and painted to resemble bronze. The propeller shaft has been turned from wood, made in two sections, and can be withdrawn thus disengaging the propeller. The shaft has been painted to resemble iron or steel. The apparatus for raising and lowering the propeller has been made in wood and metal plate, painted a uniform bronze colour, and is attached to two lengths of chain which are attached to the top of the apparatus through two large square apertures in the frame. Attached to the right-hand side of the frame a paper label has been applied bearing an inscription (not legible).