Vintage chalkboard liner

Vintage music staff chalkboard liner, also known as a raster, featuring five spring clips designed to hold pieces of chalk. Used by teachers to quickly draw a five-line musical staff or guidelines for penmanship on a blackboard. Features a green-painted wooden handle and top bar with a metal frame holding five individual metal prongs/clips for chalk sticks. Commonly found in mid-20th-century classrooms (circa 1940s) Excellent vintage condition with no rust.