Circa 1951-1959: The Tom and Jerry mug was hand shaped with metal tools to achive the unusual concave shape. The wonderful hourglass shape couldn't be produced by a mold alone, so workers shaped them (thus explaining why some are more curvy and thinner than other mugs). Because of all the handwork there is much variation in the thickness and curves of the Tom and Jerry mugs. Since the foot was shaped by hand they couldn't be marked in the mold so they were also hand-stamped with the Genuine Fiesta mark (some cups escaped the marking process, so it is not uncommon to also find the T&J mug unmarked). This example in 50s Chartreuse glaze is in excellent condition with no damage.