This is a sandwich watch case design. The front and back are carbon fiber materials, and the middle is 316L stainless steel. Use a transparent case back, the water resistance of 100m maximum. The carbon fiber is fixed with the stainless steel with screws, 12 + 8 screws. The carbon fiber has an outstanding texture, the 316L stainless steel case with refine polish, precision cutted. This case fits with the skeleton movement. 8N24, 8N40, NH70 series.

The difference between a mechanical watch movement and an automatic watch movement
Both mechanical watch movements and automatic watch movements are types of mechanical movements, but there are some key differences in their power source and how