The Oris Diving Aquis Date 36.5mm 01 733 7770 4158-07 4 18 66FC is a modern masterpiece and a must have for any watch enthusiast. The case is made from a combination of ceramic and stainless steel and is round shaped and measures 36.5mm in diameter . The caseThe bottom is screwed and has a visible bottom, which allows a deep insight into the movement. The watch glass is made of sapphire glass, which is extremely durable. Functionality-Plain 3-Hand Movement-Automatic