Circa 1936-1938: Bottom Rings: Not only is the number one sized fiesta nesting bowl hard to find, but with inside bottom rings it is always a treat and a nice way to wrap up a set. The extra inside rings guarantee production before 1939 and showcase the design concept of the concentric rings. This example in bright and sunny FIesta yellow is in good condition (please note some minor wear to the inside bottom and one glaze blemish near the base, shown in the 7th and 8th pictures), nests perfectly and is nicely inscribed on the bottom. Measures 4 15/16" x 3 9/16"