Cartier, a rare pair of onyx cameos and frame, 1870s, the two onyx cameos depicting the masks of

Cartier, a rare pair of onyx cameos and frame, 1870s, the two onyx cameos depicting the masks of Comedy and Tragedy, each with a gilt metal border, housed within a red velvet frame, the reverse with a folding stand and suspension hoop, cameos each 2.3cm diameter, frame 12.0 x 7.7cm, cameos unsigned, frame signed Cartier, 9 Bd des Italiens