It's been almost a year since the release of the new generation of Rolex Daytona caliber 4131. Earlier this month, Clean relaunched four models of Daytona with the Shanghai 4131 caliber after more than half a year of tireless efforts. This movement is well worth waiting for. What are the differences between the genuine Rolex 4131 movement and the 4130 movement? Rolex 4131 automatic chronograph movement, on the basis of 4130 movement, upgraded Rolex Chronergy escapement. This is the "skeletonized escapement" used by Rolex on the 32 series movements. The number of ball bearings on the automatic tourbillon has also been increased. The old caliber 4130 had 7 ball bearings, the new caliber 4131 has 29 (I counted). In terms of movement performance, there are no changes, the 4131 still has 72 hours of power. In terms of movement polishing, the new 4131 caliber, in the upper plate, uses Geneva stripes decoration, while the old 4130 caliber is all radial brushed finish. One of the platinum case Daytona, with a transparent bottom, uses an all-gold automatic tourbillon; the other Daytona with a closed bottom uses a steel rotor piece.   Many watch lovers who pay attention to Daytona replica watches know that only before Clean's Daytona used the Danton 4130 movement. This movement has been verified in the market for several years, the quality is very stable, and the power reserve is also close to 65-70 hours. So how does the Shanghai movement replica caliber 4131 perform? We disassembled an original Rolex 4131 movement and Shanghai 4131 movement for this…