The Differences Between The 3 Versions Are As Follows
| Grade | Japanese movement | Swiss movement A | Swiss movement clone AAA+ |
| Time Accuracy | -8/+8 sec per day COSC certified | -5/+6 sec per day COSC certified | -2/+3 sec per day COSC certified |
| Stainless Steel Type | 316L Stainless Steel | 904L Stainless Steel | 904L Stainless Steel |
| Crystal | Sapphire crystal | Sapphire crystal | Sapphire crystal |
| Manufacturer | Second-tier replica watch Factory | First-tier replica watch Factory | Top 10 Replica Watch Factory |
| Logo & Markings | 90% Exact on entire watch | Exact on entire watch | laser etchings |
| Dial | 90% exact detail and font | Exact detail and font | Genuine (accurate) |
| Waterproof | Tested up to 30m（Not recommended for diving） | Tested up to 100m（Not recommended for diving） | Tconsistent with the official |
| Life expectancy | Â 3-5 years | Lifetime | Lifetime |
| Warranty | 3 Years | Up to 5 Years | 2 Years |
There are three main differences. Movement, dial, strap. Better versions have better movements, better dials and excellent water resistance.
Original Swiss movement(purchased from Switzerland)
Constant movement-precise, robust and reliable
They are all certified by the Swiss Chronometer Testing Center (COSC) to ensure superior performance and meet strict standards of precision, reliability, shock resistance and winding efficiency, and are easy to maintain.
Stable balance wheel-The large balance wheel is fitted with a gold fine adjustment nut to ensure precise adjustment and stable operation of the device.
Rolex end-coil hairspring-The outermost hairspring coil is curled inwards to resist the effects of the gravitational center of gravity. This allows the balance wheel and the hairspring assembly to oscillate perfectly balanced and concentric (isochronous), and allows the watch to achieve better timekeeping accuracy at any position.
Fine finishing-Only our certified watchmakers (with more than 10 years of experience) have access to specific tools to see the constant-motion movements, which are meticulously finished with the utmost watchmaking skill. The pressure plates and gears are circular-grained, the bridges are polished, circular-grained or snailed, the tops of the screws are mirror-polished, and all edges are bevelled and polished.
Water resistance Diving depth up to 300 meters under the sea
The Oyster watch features a sealed Oyster case-The original Oyster case features a triangular pitted outer ring that can be screwed into the middle case with the help of a special Rolex tool. Over the years, the construction of the Oyster case has been refined to make it more robust and reliable. This technical innovation allowed the case to be fitted with a rotating bezel, which is particularly important for diving watches.
Screw-down caseback with Rolex triangular pit pattern-The Oyster caseback is screwed tightly into the middle case, making it fully sealed. The distinctive triangular pit pattern on the caseback is derived from the 1926 Oyster watch, and only authorized Rolex watchmakers were able to assemble the movement with specific tools.
Material – Oyster Steel-Rolex’s equivalent Oyster steel alloy is used. Oyster steel is a type of 904L steel, corrosion resistant and polished to give off a dazzling glow. 904L steel is commonly used in high-tech, aerospace and chemical industries, and its excellent corrosion resistance is comparable to that of various precious metals.
Strap
Featuring the same Rolex double extension system strap made of highly resistant Oyster steel, the Rolex Glidelock buckle allows divers to extend the strap up to 20 mm at 2 mm per compartment.