Four-piece mold for top chamber pot with initials JVDP, 1751, mold casting tool tools equipment base metal bronze, cast turned Four-piece bronze mold for top of chamber pot. signature: JVDP and 1751 (Jan van de Pol at the completion of the letters are slightly shortened) Rotterdam tin casting tin 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.