Sample of the initial superphosphate produced in 1968.The Portland facility began as a fertiliser manufacturing plant after being commissioned on November 24, 1968. Cresco Fertilisers, which opened the site, was later sold to Pivot in 1972.Domed shaped glass container with glass base. Clear glass to see contents on inside. Superphosphate on the inside of glass container is sand like in appearance. Has a cork closure at the base of the object. Sticker is on the side of the object with the inscriptions. INITIAL SUPER PRODUCED PORTLAND 20/6/1968port of portland, exports, superphosphate