Waterfall furniture from out of the 1930s and 1940s supported quite different hardware than what the general public was used to. The curved hardware usually had some bakelite accent or attachment that ranged in color from almost yellow, rusty red, amber brown, to a dark brown. To compliment the handles or pulls, were a variety of knobs. These are an example of those.
This pair of knobs or pulls have a chunk of amber in the shape of a round tube. It is mounted on a nickel-plated finial and then is completed with a small washer-like piece of bakelite. The knob (tube) measures 1 1/2 inches long and 3/8 inches round. The overall pull projects from the face of the drawer one inch.
The screw is part of the pull.