This is an unusually good example of a 1970s Op Art on Reverse Painted Glass by Turner Manufacturing. The shapes and palette are clean and bright and slightly evocative of Josef Albers, and as always, the reverse painted glass is crisp and highly saturated. Couldn't quite get the colors right by photo; the yellow is close to a pure yellow, not mustard. In very good condition with some oxidation to the metal frame. Measures 30 X 40, and can be hung in any direction. $495.