Lot 772. A German turned ivory cup, 18th century; height 11 1/4 in.; 28.6 cm. Estimate 30,000 — 50,000 USD. Lot sold 50,000 USD. Photo Sotheby's

the domed circular base with scallop-banded edge, rising to a field of concentric scales beneath two downturned rings of flared petals, the baluster-form stem comprised of a fluted urn form beneath an openwork knop and a fluted stalk, supporting a large cup, the underside decorated with a concentric scale design similar to that on the foot, a gadrooned register above, the undecorated upper portion divided by a deeply recessed band, the top register of oval section. 

Provenance: Christie's London, April 20, 1988, lot 74

Sotheby's. Property from the Collections of Lily & Edmond J. Safra - Volumes I-VI. New York | 18 Oct 2011 - www.sothebys.com