Harvey K. Littleton (American, 1922 - 2013)
An American Studio Glass Movement Glass Sculpture titled "Descending Form" by, Harvey K. Littleton consists of blown overlay, colored glass in colors of purple, pink, lilac, and orange cased in a heavy clear glass overlay and further cut and polished. The piece is signed, "©Harvey K. Littleton 11-1989-3"
Literature:
Harvey K. Littleton: A Life in Glass; by, Falconer Byrd - pg.136 - for similar example