15 juin 2010
An art deco nephrite, chalcedony and enamel desk clock, by Ostertag
An art deco nephrite, chalcedony and enamel desk clock, by Ostertag. Photo: Christie's Images Ltd 2010 The black lacquer square case flanked on either side by a carved green nephrite parrot, to the two-tiered beige chalcedony and green nephrite pushpiece,...