The case is made of 904L fine steel, and all original accessories are imported from Germany using CNC scanning. All accessories are interchangeable with the original parts on a one-to-one basis, including the case, bezel, bottom cover, inner cover, lugs, strap, and watch. The difference between 306 and 904L steel is reflected here. 306 is less durable and can easily get scratched! No one wants to use a watch a few times and it will look bad. Another reason for scratches is incorrect size data. The precision product of a watch can be processed in a micron-level size by a few centimeters. This is something that cannot be done on the market. So I Only then can we say that we are truly exclusive! ! ,