A gold, enamel and split pearl virgule watch with short chatelaine, unsigned, circa 1830

unusual gilt full plate movement, virgule escapement, raised barrel and symmetrical balance bridge,  gilt engine turned dial, engine turned arabic cartouche numerals, white enamel chapter ring, blued steel moon hands, split pearl bezels, later back with polychrome enamel scene flora and fauna, heightened with gold scene of water carriers, with short chatelaine decorated with enamel heightened in gold, with presentation case