The arms are those of Ferrers impaling Weston of County Derby

Cf. John Twitchett, op. cit., p. 274, pl. 378 and the example offered in these Rooms on 13 July 1981, lot 100. For a dessert-dish from this service see John Murdoch and John Twitchett, Painters and the Derby China Works, p. 140, pl. 83A