The arms within a lozenge are those of an unmarried lady of the Wynne family of Wales, probably engraved about 1740–50. The jug is inscribed on the underside: The legacy of John Williams of Revelvack.
Inscription: On underside of foot: The Legacy of John Williams, of Revel Vâck
Scratched on underside of body near maker's mark: HW
Marking:  Britannia (English quality mark for sterling);  Lion's head erased (English quality mark for sterling);  CH, fleur-de-lis between 2 pellets, above, crowned in shaped punch (maker's mark for John Chartier);  Gothic G in pointed shield (London date letter for 1702–3).
Location of marks: – on underside of body inside foot; ,  on insetting rim of cover.
[ Thomas Lumley, Ltd. , London, until December 21, 1955; sold to Irwin Untermyer ] ; Irwin Untermyer (1955–68; to MMA)
Artist: James Cox (British, ca. 1723–1800)Date: 1766Medium: Case: gold with diamonds and paste jewels set in silver, pearls; Dial: while enamel; Movement: partly gilded brass and steel, wheel balance and cock of silver set with paste jewelsAccession: 1982.60.137On view in:Gallery 540