Physical description
To be used for shaping butter into a cube. Mould is constructed of four pieces of wood joined together to form a rectangular central hollow. Small pieces of timber have been nailed in to reinforce the joins. The hollow would be filled with butter, then either the mould would be tapped sharply on a hard surface to remove the square of butter, or a plunger or other device used to push the butter from the mould.
Note: Mould is fairly roughly made, suggesting it is home-made, and the absence of grease etc on inside of mould suggests it may never have been used.