Swiss-Grade Caliber 2236 Clone Movement
The Rolex Datejust 31 278240 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 it uses a silicon Syloxi hairspring for stable timekeeping. 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. The caliber drives the central hours, minutes, seconds, and the date at 3 o'clock.
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 smooth sweeping seconds hand and the quiet rotor confirm the Swiss-grade build of this Datejust 31 super clone. The 100-meter water resistance and the screw-down Twinlock crown let the watch hold its seal through daily wear, hand washing, and light water contact.
Spec grid
TypeAutomatic, self-winding
Frequency28,800 vph (4 Hz)
Power ReserveApproximately 55 hours
HairspringSilicon Syloxi type
WindingAutomatic bidirectional
FunctionsHours, minutes, seconds, date