Bell and Ross Replica high-tech watchmaking, the new BlackRock hollow flywheel BRX2-MRTB-SK-ST watch design concept is: hollow machine core is worn on the wrist, square BR-CAL.381 machine core is placed between two pieces of high-grade sapphire crystal glass, to ensure that the field of vision is completely unlimited, so that the case from the visual disappearance. Hollow dial to show movement, high difficulty CNC production method, overhead dial scale