Nécessaire incorporating an automaton watch, ca. 1770–72 Signed by James Cox (English, ca. 1723–1800) Case: moss agate, mounted in gold and set with diamonds, rubies, and emeralds; silver; and mirror glass; dial: white enamel, with frame pavé set with paste jewels; 3 1/4 x 3 9/16 x 2 1/2 in. (8.3 x 9 x 6.4 cm)