Bakelite, Catalin or early heavy plastic. Cantilever lid. Fantastic Art Deco column and line design. 6 1/2″ long, just over 2″ high and 3 3/4″ front to back. Not sure of original use but these are usually marketed as Jewelry or trinket boxes. You decide how to use it!
Some age darkening in a band mostly along bottom edge but extending on front/left side. Otherwise fantastic condition and beautiful deep color.