Although the ref. 116610LV retained the common 40mm case diameter of all Submariner Day products preceding it, The form of the case was revamped. Submariner watches that belong for the 11661x family members of references have what is called the “Super Situation” – characterized by a thicker profile, fatter lugs, https://www.watchesworld.com/summer-delights-top-watches-for-men-and-women/