Four-piece bronze mold for pot of butter pot, mold casting tools tools equipment base metal bronze, cast Four-piece bronze mold for pouring the pot of butter pot core: 2834 325 Rotterdam tin foundry tin stain tin Meeuws Druy craft Shapes are from from the originally 18th century Rotterdam tinnegieter J Druy. The large molds that were not signed or dated were the property of the tinker guild and were rented to the small tin caster.