A George III nutmeg grater of classical urn form

A George III nutmeg grater of classical urn form, on a canted oblong pedestal foot, with a beaded border and knop finial, the domed cover and foot both hinged, to reveal a steel grater, each side engraved with an oval cartouche, one initialled 'AGB', the other 'EUB', unmarked, c.1775, 3.1in (7.9cm).