Swiss-Grade Clone of Caliber 3255
The Rolex Day-Date 40 super clone runs on a Swiss-grade automatic clone movement engineered to match the in-house Rolex Caliber 3255 on frequency, autonomy, and feel. The movement operates at 28,800 vibrations per hour, holds 70 hours of power reserve on a single full wind, and drives the day display, date display, and central seconds hand through the instantaneous Day-Date complication. The Caliber 3255 generation replaced the 3155 in 2015 and added 14 new patents covering the escapement, the barrel, and the time-setting system.
Chronergy Escapement Design Inspiration
The clone movement follows the Chronergy escapement architecture Rolex patented for the 3255 family, which offsets the pallet stones and lengthens the impulse pin for a 15% gain in energy efficiency over a standard Swiss lever escapement. The escapement holds the watch within tight daily accuracy after factory regulation. The Paraflex shock absorber design carries over from earlier Rolex calibers and improves shock resistance by approximately 50% against the prior Kif system.
Accuracy and Finishing
Daily deviation holds within -2 to +2 seconds per day after factory regulation, in keeping with the Superlative Chronometer specification Rolex applies to the genuine Day-Date 40. The clone movement features perlage on the mainplate, circular graining on the wheels, and the signature Rolex coronet engraving on the rotor. The 31-jewel bearing count matches the genuine Caliber 3255 architecture.
TypeSelf-winding automatic
Frequency28,800 vph (4 Hz)
Power Res70 hours
Jewels31
WindingBidirectional Perpetual rotor
Accuracy2 to +2 sec/day after regulation