CLEVENGER BROS. GLASS WKS. was operational from 1929 to 1999 in ClAYTON, NJ. Their glass was handmade using techniques perfected by the Moore Bros. Glass Works, circa 1880. Clevenger Bros was the last "Green System" glass blowing shop of its kind in America. Green system glass used glass which contained natural impurities thus creating interesting effects in the glass.
