About this objectA collection of four wooden patterns used in a foundry to cast machine parts. All large disc shaped. Part 1 - with thickened rim and central cylindrical pillar with flat flanged sides and central knobs. Part 2 - with four circular cutouts, central disc with flat edge and rectangular spokes. Part 3 - with two triangulated spurs each with cylindrical pillar, central pillar with reinforcing triangular buttresses. Part 4 - central cylindrical pillar.