The arms are those of de Salis impaling those of Fane.
Jerome, Count de Salis of Slogio (1709-1794), was naturalized as a British subject in 1730. His father, Peter de Salis, served as envoy and Minister Plenipotentiary of Emperor Joseph I of Germany at the court of Queen Anne, and was created a Count of the Holy Roman Empire in 1748. In January 1735, Jerome married Mary, the sister and heiress to Charles, Viscount Fane and Baron of Loughguyre. When Viscount Fane died without issue, the estates devolved on the de Salis family.
This coffee pot, bearing the impaled arms of the two families, was evidently ordered on the occasion of the marriage in 1735 and forms part of a group of silver made for the de Salis family. Other Lamerie silver bearing these arms includes a pair of sauceboats, 1734, illustrated in The Glory of the Goldsmith: Magnificent Gold and Silver from the Al-Tajir Collection, 1989, p. 98, no. 69; a set of six table candlesticks, 1733/34 sold Christie's, London, 31 March 1998, lot 105 and a circular kettle with triangular tray, sold from the collection of the Count de Salis, Sotheby's, London, 6-20 February 1986, lot 175.
Mary Fane, Countess de Salis (d. 1784)
Jerome, 2nd Count de Salis (1709-1794)