A lady's enamel and diamond-set pocket watch, by Longines, late 19th century, the polychrome enamel cover depicting a putto rowing a boat preceded by two swans and a bird, accented by rose-cut diamond foliate decoration, to the reverse engraved with the initials 'Ct', opening to reveal a circular cream enamel dial, with Roman numerals and Arabic numeral outer track, subsidiary seconds dial and blued steel hands, dial and movement signed Longines, case with maker's mark Ehj & Co for E H Jaccard & Cie Geneve, numbered 501604, case mounted in 18 carat yellow gold, dial 2.8 cm