When the ref. 116610LV retained the classic 40mm case diameter of all Submariner Day models previous it, The form of the case was revamped. Submariner watches that belong for the 11661x household of references have what is known as the “Tremendous Case” – characterized by a thicker profile, fatter lugs, https://www.watchesworld.com/summer-delights-top-watches-for-men-and-women/