A George IV 18ct gold open-faced pocket watch

A George IV 18ct gold open-faced pocket watch, the gold dial with gold Roman numerals to the textured chapter ring, with engine-turned decoration to the centre, the movement signed FB Adams, St John Square, London, 37511, with diamond end-stone to the balance cock engraved with grotesque marks, heavily chased with foliate shell decoration to the border, London marks for 1822, 110g total weight