Jan van der Pol, Four-piece bronze mold for lid of tap jug with initials JVDP and 1751, cast molding tool tools base metal bronze wood, cast turned Four-piece bronze mold for pouring lid for tap jug. signed IVDP and 1751 (Jan van der Pol, some of the initials have disappeared in the edge of the core) Rotterdam tingieterij tin staining tin Meeuws Druy craft Shapes are 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.