Swiss-Grade Caliber 2236 Clone Movement
The Rolex Datejust 31 278341RBR 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 caliber Rolex builds with 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 more than 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 278341RBR 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
Jewels31
WindingAutomatic bidirectional
FunctionsHours, minutes, seconds, date