Jan van der Pol, Two-piece bronze mold for bottom of jug with initials IVDP and 1755, mold casting tool tools equipment base metal bronze, cast twisted Two-piece bronze mold for casting bottom or base of jug. signed I V D P and year 1755 (Jan van der Pol) Rotterdam tin tinker tin tin Meeuws Druy artisan 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.