Daum mushroom vases are special and technically sophisticated because multiple techniques were used to produce them. First the vase was acid-cut. Then the mushrooms were wheel-carved to give them intricate detail. Finally they were hand-painted with glass enamel paints and fired.  Mushroom vases are the only Daum vases that are both wheel-carved and enameled. Museum-quality. 4¾" tall, pillow-shaped. Engraved signature on the underside. Mint condition.