Attributed to Johann Jakob Betzold (1621-1707), South German, second half 17th century, Sleeve. Photo Sotheby's

ivory; height 5 1/2 in., 14 cm. Estimation 5,000 — 8,000 USD

Johann Jakob Betzold was a student of Leonhard Kern, and worked closely with Kern's nephew, Johann Georg Kern.

Compare the present ivory with a silver-mounted ivory tankard in the Kunstgewerbemuseum in Berlin, inv. no. K3122, which was formerly attributed to Leonhard Kern and is now ascribed to Betzoldt, and another carved ivory sleeve by Betzoldt, now with 19th century gilt-silver mounts, in the Musée du Louvre, inv. no. 3895.

Sotheby's. Important Old Master Paintings and Sculpture. New York, 30 janv. 2014 - www.sothebys.com