This interesting example has a fragment of a label...
Llewellynn Jewitt, History of Ceramic Art, 1874.
In 1763 Mr. Josiah Wedgwood...invented a species of earthen ware, for the table, quite new in its appearance, covered with a rich and brilliant glaze... manufactured with ease and expedition, and consequently cheap.
Josiah Wedgwood, quoted in an article published in 1789
this kind of ware was much in request about 1740.
Josiah Wedgwood, Commonplace Book, January 15, 1765