Omega Seamaster Series Diving Watch with Case Back, Hang Tag, and Warranty Card - Three-in-One. Equipped with Omega's exclusive original 8500 automatic mechanical movement, the watch features a 42mm case diameter and a thickness of 10mm. It includes a date function, a 316 stainless steel case, a unidirectional rotating bezel, a sapphire crystal glass, and a screw-down stainless steel crown. The 316 stainless steel bracelet comes with a stainless steel folding clasp.First and foremost, this is a diving watch, so it has all the essential features expected of a diving watch: impressive luminosity, deep water resistance, and underwater timing functions, among others. However, what I want to emphasize about this watch is the quality of wear it provides. Unlike other brands, the Seamaster feels more comfortable and natural on the wrist. The connection between the wrist and the watch increases significantly the moment you put it on. A great watch needs not only perfect design by a skilled designer but also high-quality materials to showcase its value. Good products are worth having.