The arms are those of Howe, as borne by Emanuel Scrope [Howe], 2nd Viscount Howe (c. 1699-1735). He succeeded his father in 1712 and in 1719 married Mary Sophia Charlotte, daughter of the Hanoverian Baron von Kielmansegge, Master of the Horse to George I.
This dish matches another of the same date and maker in the Untermyer Collection at the Metropolitan Museum of Art, illustrated in Yvonne Hackenbroch, English and Other Silver in the Irwin Untermyer Collection, 1969, no. 122. The Metropolitan dish, which has the same arms as the present example, was engraved with an Earl's coronet when the 4th Viscount was elevated to that title later in the 18th century.