A Delftware blue and white circular plaque

A Delftware blue and white circular plaque, probably Liverpool, painted with a Welsh armorial, possibly for the Wynn family, and bearing the motto 'Quod Tibi Hoc Alteri', mounted and framed, c.1740, the plaque cut from the well of a plate or dish, 13cm. The tendency for younger sons of Welsh families to pursue careers as merchants in Liverpool in the mid 18th century indicates an area of manufacture.