A Swiss enamel and rock crystal pocket watch, mid 19th century, the white enamel dial with Roman

A Swiss enamel and rock crystal pocket watch, mid 19th century, the white enamel dial with Roman hour indicators and Arabic numeral minute indicators, with gold hands and winding aperture, within a bezel set with rose-cut rock crystal, mounted in gold, the reverse with a painted enamel landscape within a foliate border, to a chain with winding key, length 4.9cm including suspension hoop, indistinct assay marks