A George III silver salver with a later cast border

A George III silver salver with a later cast border, by Carter, Smith and Sharp, London 1778, the cast border with London Assay Office addition marks for 2012, circular form, chased foliate decoration, inscribed, ' Presented to Frederick Cobb, M.D, by his colleagues the Lecturers at the London Hospital in testimony of his unremitting attention to the general interest of the Medical School, May 1835', the pierced cast border with busts, animals and scroll decoration, on three cast Bacchus mask feet, diameter 36.7cm, approx. weight 46oz.