AN ART DECO PLATINUM AND DIAMOND CONVERTIBLE PENDANT/BROOCH AND CHAIN The plaque brooch set with old European and old mine-cut diamonds, approximate total weight 3.50 carats, with pierced foliate motifs and millegrain accents, convertible to a pendant, suspended from an associated art deco chain with fancy, filigree links, and bezel-set old European-cut diamonds, approximate total diamond weight 0.35 carats, weight 15.3 dwt, brooch length 1 3/4, pendant length 2 1/16, chain length 24 7/8 in. For further information on this lot please visit Bonhams.com For further information about this lot please visit the lot listing