Counting on the popularity of the earlier AC-One models, the AC-One 38 Automatic aims to complement the 45mm-diameter models with feminized version. Having a much smaller case diameter of 38mm means that the original proportions of the dodecagonal-cased AC-One 45 had to be scaled down carefully. While adhering strictly to the design codes of the AC-One, the case of the AC-One 38 was given a slight makeover in order to make it more curvaceous than its masculine counterpart.