The outer and back case are made of injected aluminum, later, anodized, while the inner case is made of injected polyurethane rubber. The windows is made of Polycarbonate, and the face behind it is injected ABS, silk screened with the indications, while the disks are CNC cut steel, then painted.
The movement, its holder and the crown stem are standard Miyota ones, while the crown and closing flaps in the back cases are made of injected brass, with CNC machining.