An 18th century and later gold and shagreen mounted triple cased plunge quarter repeating open-faced

An 18th century and later gold and shagreen mounted triple cased plunge quarter repeating open-faced pocket watch, the gilt fusee movement repeating on a bell with scroll pierced balance cock, the backplate detailed 'Debaufre, London', the enamelled dial with black Arabic numerals, the inner case with pierced scroll decoration, the pair case repoussé decorated and pierced with flowers and scrolls, case diameter 4.6cm, total weight 91.1g, with gilt metal and later shagreen mounted outer case, outer case diameter 5.2cm, together with skull watch key.