Though the ref. 116610LV retained the classic 40mm case diameter of all Submariner Day models preceding it, the shape of the case was revamped. Submariner watches that belong for the 11661x spouse and children of references have what is known as the “Super Circumstance” – characterized by a thicker profile, https://www.watchesworld.com/summer-delights-top-watches-for-men-and-women/