The N4130 movement Cosmochron Daytona Carbon Fiber Diw Custom Edition watch has a 40mm diameter, the

The N4130 movement Cosmochron Daytona Carbon Fiber Diw Custom Edition watch has a 40mm diameter, the same as the standard Daytona. The case is entirely made of carbon fiber, a new type of material with a timeless black color and an elegant, luxurious texture. Carbon fiber is flexible on the outside but strong on the inside, lighter than aluminum but stronger than steel, and corrosion-resistant. The matte black texture of the case is varied, and each carbon fiber watch is unique due to its different cutting methods. The strap is a Velcro design, with nylon on the front and leather on the back, and the buckle is also made of carbon fiber.