Swiss-Grade Caliber 2236 Clone Movement
The Rolex Datejust 31 278288RBR super clone runs on a Swiss-grade automatic movement engineered to match the genuine Rolex Caliber 2236 in feel, frequency, and autonomy. The Caliber 2236 is the midsize 31mm movement Rolex pairs with the Datejust 31 and fits the smaller case where the 3235 does not. The movement operates at 28,800 vibrations per hour, winds bidirectionally through a free-rotating rotor, and holds a power reserve of approximately 55 hours for over two days off the wrist.
Accuracy and Daily Performance
Daily deviation holds within -5 to +8 seconds per day after factory regulation, close to the chronometer standard of the genuine Caliber 2236. The genuine 2236 uses a silicon Syloxi hairspring for stability against magnetism and temperature shifts, and this super clone matches the smooth sweeping seconds hand and the quiet rotor that confirm the Swiss-grade build. The 100-meter water resistance and the screw-down Twinlock crown let the 278288RBR super clone hold its seal through daily wear and hand washing.
Spec grid:
TypeAutomatic, self-winding
Frequency28,800 vph (4 Hz)
Power ReserveApproximately 55 hours
Jewels31
WindingAutomatic bidirectional
FunctionsHours, minutes, seconds, date