Rolex Daytona Calibre 4131: Clean Factory vs Genuine Movement Comparison
This record compares the original model with its ETA / super clone counterpart. This is a side by side review video. Not a sales page; The differences are shown through the movement, case and usage.
All original benchmarks · Time guide
Comparison of Rolex Daytona 4131 Original and Clean Factory Super Clone (ETA Watch)
The new reference 126500LN Daytona and its Caliber 4131 movement, introduced by Rolex on its 60th anniversary, have raised the bar in the world of watchmaking. The Dandong 4131 caliber super clone version produced by Clean Factory is the ETA watch closest to the original model, from the thinness of the case to the chronograph gear arrangement. The technical table below compares the workshop measurements of the original Daytona with the Clean Factory clone model.
| Criteria Examined | Original Model | Super Clone (ETA Clock) | Workshop and Test Result |
|---|---|---|---|
| Chassis and Dimensions | 11.9 mm thin, 904L Oystersteel | 12.0 mm thin, 904L Stainless steel | The case profile is exactly the same with a tolerance of 0.1 mm; The weight and balance on the wrist are no different. |
| Mechanism (Caliber) | Rolex Caliber 4131 (Cut-cut rotor, Paraflex shock) | Dandong 4131 Complete Clone movement | The column-wheel chronograph structure is active; Decoration bridges and cut-out rotor are replicated. |
| Chronograph Function | 3-6-9 subdials are fully synchronized and active | Fully functional chronograph and instant reset | Start/stop with the top button and instant reset with the bottom button work perfectly. |
| Ceramic Bezel & Scale | Cerachrom ceramic, platinum PVD tachymeter filler | Real ceramic, platinum PVD plated figures | Bezel font thicknesses and 400 tachymeter markings are 98% similar even under a microscope. |
| Power Reserve | Approximately 72 Hours | Approximately 70-72 Hours | In Timegrapher tests, 71 hours of uninterrupted operation and stable amplitude were measured. |
| Bracelet & Buckle | Oyster bracelet + 5 mm Easylink extension | 904L Oyster bracelet + Easylink mechanism | The internal chamfering of the bracelet links and the hardness of the buckle spring give it an original feel. |
Workshop and Craftsman Evaluation: How to Identify the Daytona 4131 Clone?
The Clean Factory 4131 model has the most sophisticated chronograph mechanism ever produced in the ETA watches category. It is almost impossible to distinguish the watch by looking at it from the outside or by pressing the chronograph buttons. The only clear distinction is that when the rear cover is removed, look with a magnifying glass at the spring geometry of the Paraflex shock system and the micro-finishing details under the balance bridge.