Two-piece bronze mold for convex lid with screw thread of barrel pot, mold casting tool tools base metal bronze, cast twisted Two-piece bronze mold for convex lid with screw thread of gortepot or butter pot topside: 2834 201 Rotterdam tin foundry tin stainer tin Meeuws Druy craft Shapes are from the van origins 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.