A Barraud's silver pair cased keywind open-faced gentleman's pocket watch, the gilt fusee

A Barraud's silver pair cased keywind open-faced gentleman's pocket watch, the gilt fusee movement with cylinder escapement, the backplate signed 'Barrauds Cornhill London' and numbered '2/924', the signed and numbered enamelled dial with Roman numerals and subsidiary seconds, the inner and outer cases London 1780 by Angela Marson, outer case diameter 5.3cm (the inner case front lacking), with a later box.