Introduction
Within the replica watches sector, Clean Factory (C Factory) has established recognition for its precision replication of Rolex timepieces. This analysis adopts a professional watchmaker’s perspective to objectively examine craftsmanship deviations between Clean Factory’s Rolex GMT-Master II M126710GRNR-0003 (black-gray bezel) and its genuine counterpart.Comparison of technical details of core components such as ceramic bezel, hand system,case structure, etc. Revealing the true level of its replica watches and providing verifiable technical references for watch enthusiasts.
Frontal Comparison
From a frontal comparison perspective, you’ll find Clean Factory’s timepiece exhibits remarkably high similarity to the genuine article. The case material utilizes 904L stainless steel – identical to Rolex’s proprietary alloy. However, upon closer inspection, you’ll notice the date window cyclops demonstrates slightly inferior clarity compared to authentic models, exhibiting minor blurring.

Cerachrom Bezel Comparison
The black ceramic segment exhibits 100% color accuracy. However, Clean Factory’s gray section presents a marginally deeper hue compared to genuine. Under multi-angle scrutiny, the gray saturation demonstrates perceptible variance. Despite this, overall similarity exceeds 95%—a testament to Clean’s advanced color calibration technology.
The black/gray transition achieves remarkable seamlessness. Yet comparative analysis reveals a critical distinction: genuine ceramic bezel numerals feature nearly imperceptible texturing to the naked eye, whereas Clean Factory’s engraved bases display discernible texturing under magnification.

Dial & Hands Detail Comparison
Dial Scale Nail Comparison
The Dial Scale Nail are nearly indistinguishable from genuine, but upon closer inspection, the font beneath Clean Factory’s markers appears slightly finer. This subtle difference remains virtually undetectable without magnification.

Date Window Comparison
The genuine piece exhibits clearly legible date window readings with perfectly centered numerals, whereas Clean Factory’s version shows a slight downward misalignment. The right-side numerals display reduced clarity, with the genuine font appearing more refined in weight while Clean Factory’s rendition appears slightly bolder.

Dial Font Comparison
The font on Clean Factory’s version is slightly finer while the genuine piece appears a touch bolder—these differences remain virtually imperceptible to the naked eye.

Hour Hand & GMT Hand Comparison
The overall shape of the hands is nearly identical, with only one minor discrepancy — the electroplated finish on Clean Factory’s GMT hand appears flatter at both ends when compared to the more rounded seen on the genuine version.


Case Back Comparison
The caseback appears virtually identical, while the crown (winding stem) maintains the same intentional play gap as genuine models – a deliberate design feature to prevent wear.

Movement Comparison
Model | Movement | Power Reserve |
---|---|---|
Genuine Rolex | Caliber 3285 | 70h (±1s/day) |
Clean Factory | Dandong 3285 | 68-70h (±4s/day) |
Natural Light Comparison Shots
Can you distinguish the genuine from the Clean Factory replica?






The answer: The left is Rolex genuine, the right is Clean Factory.
Beyond the date window cyclops, visual differentiation proves nearly imperceptible. Crucially, the genuine cyclops maintains crystal clarity across all viewing angles, whereas Clean Factory’s exhibits slight haze under acute perspectives.
Conclusion
Clean Factory’s GMT-Master II (Ref. 126710-0003) achieves benchmark-level visual accuracy in replica horology, though microscopic manufacturing deviations remain detectable under professional instrumentation.Nearly undetectable during daily wear. When objectively evaluated against industry standards, this reproduction demonstrates competent craftsmanship worthy of consideration by discerning collectors.