3025213 Singing-bird box, c.1840 (enamel, diamonds & gold) by Swiss School, (19th Century); 9x3 cm; Private Collection; (add.info.: The brass movement with chain fusee, stacked cams, fly regulator, entirely engine-turned and engraved foliage decorated rectangular box, the cover with chased and engraved acanthus, foliage and blue champleve enamel over engine-turned ground with scroll decoration, a slide to the front opening the hinged oval cover decorated with royal blue enamel over engine-turned ground set with rose-cut diamonds, opening to reveal a finely pierced and engraved scroll decorated grille and to release the colourfully plumed bird, rotating on its axis, chirping, flapping its wings, wagging its tail, turning its head and opening its beak); Photo 穢 Christie\'s Images; Swiss, out of copyright.