Four,4 Hankscraft Ridged Egg Cups 1939, ivory color, art deco style. Three are in perfect condition without crazing, or even a flea bite, and, one has had a repair, see photos. I believe these were originally sold to go with the Hankscraft electric egg cooker. They look like they will match Fiestaware from the time when these were manufactured in the late 1930's.
Interesting Note: Hankscraft Inc. was started in Madison, Wisconsin in 1920, based on an invention of Marshall Hanks. Mr. Hanks was an engineer working for the French Battery Co. in Madison, WI. His device used water to complete an electrical circuit between two electrodes. The heat from the closed circuit boiled water. When the water boils away, the circuit is broken and the device shuts off. From this invention, he patented an electric egg cooker, which became the company's first product.