These three knobs are from a piece of Waterfall furniture from the 1930s and 1940s. Waterfall furniture very often had hardware of brass and bakelite plastic. The bakelite accents were mostly of the earth-tone ambers, ranging from yellow, golden amber, rusty brown, to dark brown.
Each of these three knobs measures 1 1/2 inches across the top. The knobs are concave, with an outside edging of lines—picking up the Art Deco look. The neck of the knob 3/4 inch. As you can see, the color is a rich amber.