A POTSDAM 'RUBINGLAS' ENGRAVED AND SILVER-GILT-MOUNTED FLARED BEAKER decorated with swags of fruit and scrolling foliage pendant from tied ribbon, each bow suspending a foliate stem terminating in a flowerhead, with an applied footring, the underside with a flower-spray over the pontil mark, the silver-gilt mount to the foot with stiff leaves and moulded and chased with a band of scrolling flowering foliage (mount slightly bent), circa 1690, the mount early 18th century