Blenko Glass Williamsburg Baluster Stem Sherbets Pair. The sherbets are lead crystal. Blenko produced Williamsburg Restoration Glass from 1936-1966. The sherbets are about 5 1/4 inches tall, about 3 1/4 inches in diameter at the top, and 3 inches in diameter at the bottom. The foot has a folded rim and the pontil mark is rough, not fire polished. There are no chips, cracks, or water damage.