Bowl sherds decorated in this color scheme have been unearthed at the Pickleherring pottery works site in Southwark as well as in Belfast, Northern Ireland. A porringer of this decoration is illustrated by Anthony Ray, English Delftware Pottery in the Robert Hall Warren Collection, London, 1968, pl. 91, no. 186, where the author notes that sherds of porringers with blue and manganese splashes were found in Lambeth by F. H. Garner, as well as unfired handles with heart-shaped openings. A further porringer of this type is illustrated by Leslie B. Grigsby, The Longridge Collection of English Slipware and Delftware, London, 2000, Vol. 2, p. 207, D183. This decoration is uncommon on other wares. Among the surviving pieces is a cylindrical mug from the Lipski Collection, sold, Sotheby's, London, March 10, 1981, lot 15. The sale included a further porringer, lot 16, and a plate and a globular mug are published by Leslie B. Grigsby, op. cit., p. 201, D178 and p. 274, D248. Production of round porringers lasted into the second half of the 18th century, with dated examples recorded to 1765.