Hello watch enthusiasts! Today, we’re taking a deep dive into the Clean Factory Rolex GMT-Master II 126713GRNR, affectionately known as the “Two-Tone Black/Grey Ceramic” or the “Eggplant” bezel in Asian markets. Clean Factory (commonly referred to as CF), renowned for their commitment to detail and exceptional craftsmanship, has once again raised the bar in the replica watch industry. This review will examine the build quality, design intricacies, movement performance, and how to authenticate a genuine CF product, helping you avoid inferior imitations.
Understanding Clean Factory: A Benchmark in Replica Watchmaking
Clean Factory has established itself as a prominent brand within the luxury replica watch industry, specializing primarily in Rolex models. Unlike smaller factories, CF manages the entire production process from bezel development to final assembly. Their use of the exclusive Dandong movements, particularly the 3285 caliber in GMT models, significantly enhances their product’s reliability and authenticity. CF’s philosophy of being “virtually indistinguishable from the original” involves meticulous reverse-engineering from genuine Rolex models to replicate each element accurately.
For the GMT-Master II line, CF has notably produced top-tier replicas, including iconic variants like the “Pepsi,” “Batman,” and “Sprite” bezels. Their quick development of the “Eggplant” bezel following its original release highlights their market agility and technical prowess.
Design and Craftsmanship: A Closer Look at Perfection
Case and Material:
The CF GMT-Master II Two-Tone Black/Grey Ceramic features a standard 40mm Oyster case crafted from authentic 904L stainless steel, identical to genuine Rolex watches. The choice of 904L steel ensures superior corrosion resistance, enhanced luster, and exceptional durability compared to typical 316L steel found in lower-quality replicas. Expertly polished and brushed, the case edges feel smooth, precise, and devoid of imperfections.


Ceramic Bezel:
Undoubtedly the highlight, the ceramic bezel exhibits a striking black-to-grey gradient transition, perfectly replicating Rolex’s original design. The engraved numerals and indices are crisp and filled evenly, with platinum coating that resists fading and corrosion over time. The bezel’s rotation is smooth, accurately reproducing the tactile feel of the genuine GMT-Master II bezel.
Crystal and Dial:
The scratch-resistant sapphire crystal offers superior clarity with anti-reflective coating. At the 6 o’clock position, you’ll find Rolex’s signature laser-etched crown, an essential authenticity marker. The dial itself harmonizes seamlessly with the bezel colors, with luminous hour markers filled with genuine Swiss C3 Super-LumiNova, emitting a bright, long-lasting blue glow in low light conditions. Additionally, the characteristic GMT arrow hand stands out prominently, accurately colored and shaped as per original specifications.
Movement Excellence: The Dandong 3285 Caliber
At the heart of the Clean Factory GMT-Master II Two-Tone Black/Grey lies the renowned Dandong 3285 movement, currently regarded as one of the most advanced replica GMT movements. This caliber features:
- Independent Hour Hand Adjustment: Allowing easy changes across time zones without disturbing minute or second hands.
- Bidirectional GMT Hand Setting: Facilitating quick adjustments of the second time zone.
- 72-Hour Power Reserve: Matching the original’s power capacity, ensuring reliable performance for daily wear.
Testing reveals exceptional accuracy, maintaining time within ±5 seconds daily. The crown’s functionality replicates genuine Rolex operation, where clockwise rotation adjusts the GMT hand, and counter-clockwise adjusts the hour hand—another important authenticity indicator.
Bracelet and Clasp: Comfort and Longevity
This two-tone GMT features a refined Jubilee bracelet with solid mid-links made from genuine 18K gold wrapped onto durable 904L steel. Unlike cheaper replicas, CF employs authentic gold-wrapping technology that significantly prolongs color retention. After extensive testing, the bracelet showed impressive resistance to color fading and wear.
The Oysterlock clasp with a micro-adjustment system allows precise sizing adjustments (approximately 5mm), adapting comfortably to wrist size changes. Detailed engravings, including “ROLEX” inside the clasp, demonstrate meticulous craftsmanship, a clear differentiator from lower-quality replicas.


How to Identify Authentic Clean Factory Products
Given the proliferation of inferior replicas falsely marketed as CF, here are key identification tips:
- Movement Check: Genuine CF GMT models exclusively feature the Dandong 3285 movement. Inspect the positioning and visible design of the balance wheel through the transparent case back (if accessible).
- Ceramic Bezel Accuracy: True CF bezels show a perfect, seamless gradient transition without distinct color divisions.
- Laser-Etched Crown: Located precisely at the 6 o’clock position, visible clearly under magnification.
- Bracelet Quality: Genuine CF bracelets show no gaps or uneven finishing in the two-tone segments.
Comparative Analysis and Final Thoughts
Compared to smaller factories utilizing modified movements or lower-quality materials, Clean Factory clearly outperforms in accuracy, durability, and overall finish. When juxtaposed with a genuine Rolex GMT-Master II, CF achieves approximately 95% similarity at a significantly lower cost, offering excellent value for enthusiasts.
In summary, the Clean Factory Rolex GMT-Master II 126713GRNR Two-Tone “Black/Grey Ceramic” represents one of the pinnacle achievements in contemporary replica watchmaking. Its precision, build quality, and attention to detail make it ideal for collectors seeking near-authentic experiences at accessible prices.
Remember, the true pleasure of owning such a replica lies in appreciating its remarkable craftsmanship and cultural significance, emphasizing responsible and informed watch collecting.
Thank you for joining our in-depth review. Stay tuned for more detailed watch insights and authentic comparisons!