The listed tungsten-weighted 904L Oystersteel construction gives this Daytona its 180g weighted presentation. It is a relevant feature because the reference is not trying to be quiet: the blue dial, red accents and white-gold-tone bezel already establish a more expressive visual direction. The added weight supports that intent on the wrist.
The Dandong 4130 automatic chronograph supplies the familiar central chronograph hand, 30-minute counter, 12-hour counter and running seconds layout. BT Factory also specifies a high-transparency sapphire crystal with AR coating. Those details make sense for a buyer who wants the blue dial to remain the focus, with a clean crystal and a structured Oyster bracelet completing the visual package.