Swiss-Grade Caliber 4030 Clone Movement
The Rolex Daytona 16520 super clone runs on a Swiss-grade automatic chronograph movement engineered to reproduce the genuine Rolex Caliber 4030 in feel, frequency, and autonomy. The genuine Caliber 4030 is the Daytona movement based on the Zenith El Primero, modified by Rolex for the 16520 generation. The clone movement operates at 28,800 vibrations per hour, winds bidirectionally through a rotor, and holds a 50-hour power reserve.
Accuracy and Chronograph Performance
Daily deviation holds within -5 to +8 seconds per day after factory regulation, close to the chronometer standard of the genuine Caliber 4030. The central chronograph seconds hand starts, stops, and resets cleanly from the screw-down pushers. The smooth sweeping motion and the quiet rotor confirm the Swiss-grade build of this 16520 Super Clone.
Spec grid:
Type:Automatic chronograph
Base caliber:Caliber 4030 clone (Zenith El Primero base)
Frequency:28,800 vph (4 Hz)
Power Reserve:50 hours
Winding:Automatic bidirectional
Functions:Chronograph, small seconds, 30-minute and 12-hour counters