Bokey TimeHello everyone, this is Bokey Watch Industry. In this watch review, we’ll talk about the BT Factory 4131 Ice Blue Daytona. The official model is the Rolex Cosmograph Daytona series m126506-0002 (Ice Blue Daytona). This watch is equipped with the 4131 movement from Dandong Movement Factory and features a transparent case back design synchronized with the original, allowing a clear view of the movement in operation. The thickness is 12.1mm, the same as the original. However, the flaws of this BT Factory version lie in the movement and materials. The original movement has more beautifully polished aesthetics and uses a free-sprung balance design. The original is made of PT950 platinum, while the BT Factory version uses 904L stainless steel, making it approximately 100 grams lighter than the original. In terms of appearance, there are no major issues, and the color is adjusted to be relatively close to the original.
