Beautiful MT. ST. HELENS WASHINGTON MAY 18, 1980, Glass Plate stamped JOE ST. CLAIR. St. Clair glass was made from Elwood, Indiana from 1938 till 1987. They made novelty items, paperweights, toothpick holders, etc. This glass plate is a novelty item marking the date Mt. St. Helen eruption on 18 May 1980. It is in superb condition, no chips or cracks. Dimensions: H: 5/8”; Dia.: 5-3/4”.