Dont know exactly how to describe this. Salesman`s sample or patent model maybe. It is a scale model of a large calibre shell. Construction of the box and other details indicate a circa 1900 manufacturing date. The box is 3 x 4.5 x 10.5. and the shell is 2 x 8.75. Not a marking to be found. The driving band is pressed into a groove. The shell is hollow. Seems to be too accurate and difficult a representation of the subject to be a mere machinist`s pastime. I have no history on this item and would like to know more about it.