A Lund's Bristol scallop shell pickle dish, circa 1748-50A Lund's Bristol scallop shell pickle dish, circa 1748-50The mould probably cast from an actual scallop shell, painted in blue with a hut next to a towering hollow rock on an island, the border with three feather and ribbon motifs, formal leaves and a shell at the base, 11.2cm longChemical analysis of a distinctive class of 'Limehouse' pickle dishes has shown these to be primarily of the Mg-P-Pb type and therefore made from a formula containing soaprock. While some examples appear to be more highly vitrified or glassy than others, it seems likely that all were manufactured at Bristol. See Ray Jones, The Origins of Worcester Porcelain (2018), pp.248-51.