4131 & 4130 Matrices
Chronograph Platform
The calibrated Dandong 4131 & 4130 integrated movement represents ourhighest level of craftsmanship in the Daytona series. It is developed from theoriginal movement, produced and assembled strictly according to the originalparts ratio. This self-winding chronograph movement is perfectly synchronizedwith the original Daytona in both dimensions and contour. It adopts an activecolumn wheel drive with a vertical friction clutch, ensuiring smooth hand operationwithout position hand jitter or excessive resistance
Lubrication
Swiss Moebius nano oil
Power Reserve
72 hours
Frequency
28800 VPH
Accuracy
+3-8 seconds/day
Winding
Bidirectional
Number of Parts
201 pieces
Power Technology
Ball bearings and efficientwinding system
Timing technology
Column wheel and verticalclutch
system
Hairspring
Parachrom
Balance Technology
Large balance wheel withmicro-adjustment screws
Feature Optimization
Material innovation: Utilizing wear-resistant alloy steel, the main splint has undergone special hardening treatment, thereby extending its service life.
Structural optimization: 27 ceramic ball bearings + Teflon red wheel design, resulting in higher chain-up efficiency and quieter operation
SHOW DETAILS
Shock Absorber Polishing and Finishing
Model & Lettering Deep Laser Engraving
Screw Hole Mirror Chamfer Polishing
Overall finish: clean, no burrs or rough edges.
Mechanical Details
Ball bearing and cam follower wheel
Vertical timing clutch wheel device
The vertical clutch uses the up and down engagement of gears to control the timing function. The integrated connection device of the vertical clutch in the cleaning factory simplifies the components and saves more space capacity. The timing function can be started and paused for a long time, and the vertical clutch design will not cause wear to the gears.
Large balance wheel and Parachrom hairspring
The cleaning factory perfectly replicates the original hairspring, unaffected by magnetic fields. Even with temperature changes, it remains extremely stable. Its shock resistance is ten times higher than that of traditional hairsprings. The outermost coil of the spring wire is curled towards the gravitational center. This enables the balance wheel and the spring component to swing perfectly balanced and concentrically (in sync), allowing the watch to achieve better timing accuracy at any position. Four gold fine-tuning screws are installed on the large balance wheel, ensuring precise speed adjustment and stable operation.
Parallel bridge plate and fine-tuning screw
The parallel bridge plate enhances the shock resistance, ensuring the precise and stable position of the balance wheel, which helps improve the timing performance. The clean factory also replicated the gold screw fine-tuning, adjusting the height of the balance wheel plate through the gap adjustment system, enabling the balance wheel to achieve the best balanced operation.