Mahogany cover, with two lubrication feed pots and separate winding handle, for double grindwheel model
Model, scale 1:8, of a stern of vessel fitted with adjustable pitch screw propeller with loose driving handle, c.1844, patented by Bennet Woodcroft, made by William Muir, Manchester, 1844-1857 Model of stern of vessel fitted with adjustable pitch screw propeller