A Battersea enamel rectangular plaque 2nd half 18th century

A Battersea enamel rectangular plaque 2nd half 18th century, printed with Perseus rescuing Andromeda from the dragon, within a gilt metal frame, 11.5cm overall. Illustrated: Cook, Simon Francois Ravenet and his Engravings on Battersea Enamels, ECC Transactions, Vol. 3, Part 4, pl. 75d. Provenance: from the collection of the Hon. Mrs H. Ionides.