My great-grandmother bought this in the 1930s at an estate sale for my grandmother. I know that Williams-Kimp was in business 1925-1952 so this would've been towards the earlier end. There are 3 pieces - the serpentine-shaped sideboard, corner cabinet (both pictured), as well as a DR table w/ 3 leaves (which are stored in the original wood crate-type box). There are 6 chairs, though these are probably from a different manufacturer. The paper label on the underside of the chairs says "Colonial Art Furniture Company, Pittsburgh PA".
This looks handpainted and the picture on each side of the cup is a little different. There is only some light gold wear and I see no chips cracks or crazing. The bottom of the saucer is the same mark but does not have the black it is just indented.