An early 19th century enamelled gold pocket watch by Dutertre

An early 19th century enamelled gold pocket watch by Dutertre, c.1800, the white enamel dial signed 'Dutertre a Paris', black Arabic numerals and further Arabic numerals for 15, 30, 45 and 60 seconds, gold hands, within a surround of blue and white enamel decoration, with a fine classical enamel scene to the reverse, the verge movement signed Detertre Paris 7469, case 48mm