QF Rolex Cosmograph Daytona 126505 18K Everose Gold Heavyweight
Q Factory bridges the physical gap between steel and precious metal replicas by utilizing a tungsten-weighted case architecture paired with the advanced Dandong 4131 caliber.
Powered by Dandong 4131 Super Clone
The Dandong 4131 is currently the pinnacle of modern Daytona replica horology. Unlike modified 7750 movements, this caliber is built from the ground up to mimic the exact architecture of the genuine 4131. It features a fully functional vertical clutch, eliminating the stutter often seen on lesser chronograph seconds hands when engaged. The column-wheel ensures that pusher actuation is distinctly mechanical and crisp. Furthermore, the movement’s thin profile allows the case to maintain the correct ~11.9mm thickness. We subject these movements to our strict QC standards to ensure optimal amplitude and beat error prior to dispatch.
⏱ Accuracy Profile:
Rated at ±15 seconds per day for this specific movement batch, though tighter regulation is often achievable.
- ✅ Power Reserve: Approximately 36 hours
- ✅ Complications: Central chronograph seconds, 30-minute counter at 3 o’clock, running seconds at 6 o’clock, 12-hour counter at 9 o’clock
- ✅ Winding Direction: Bidirectional via perpetual rotor
Technical Specifications
THE BUILDTungsten-Weighted 904L Oystersteel
The case and bracelet utilize a specialized tungsten alloy core to bring the total weight to ~180g, significantly heavier than standard steel clones. The 40mm case features the correct asymmetric lug profile and polished center links.
THE DIALBlack Lacquer with Rose Gold Sub-Dials
The dial exhibits deep, glossy black lacquer contrasting with the metallic rose gold sub-dials. Chromalight hour markers provide the correct long-lasting blue emission.
THE BEZEL18K Everose Plated Steel
The engraved tachymetric scale features precise, deep numerals filled with black lacquer, matching the genuine 126505 reference tone and contrast.
THE BRACELETOyster Bracelet & Oysterlock Clasp
Three-piece solid links with polished centers and brushed outer edges. The Oysterlock safety clasp includes a functional Easylink 5mm comfort extension link.
Why Q Factory for This Reference?
Many collectors ask: ‘Why not Clean Factory?’
While Clean Factory produces exceptionally accurate dials and standard-weight cases for the Daytona line, QF’s integration of tungsten is the deciding factor for precious metal references. A standard 904L steel Daytona weighs roughly 140g, which immediately gives away its steel construction when handled. QF’s ~180g weight provides the necessary heft to simulate solid 18K gold.
Full Disclosure: The 18K Everose plating, while visually accurate in tone, is ultimately a surface treatment; unlike solid gold, deep scratches will reveal the steel and tungsten core beneath.
Data Sheet
| MODEL REFERENCE |
126505-0001 |
| FACTORY / VERSION |
QF (Q Factory) Heavyweight Edition |
| MOVEMENT |
Dandong 4131 Super Clone |
| CASE MATERIAL |
Tungsten-weighted 904L Oystersteel (18K Plated) |
| WEIGHT & THICKNESS |
~180g | ~11.9mm |
| CRYSTAL & LUME |
Sapphire with AR | Chromalight Blue |
| DIMENSIONS |
40mm × 46.5mm × 11.9mmManual measurements — minor tolerances apply. |
| WATER RESISTANCE |
Stated 100m — professional pressure test recommended before swimming |
Collector Q&A
Q: How does the weight of the QF tungsten edition compare to the genuine 126505?
A: The genuine solid 18K Everose gold Daytona weighs approximately 200 grams depending on the number of links. This QF tungsten-weighted replica weighs approximately 180 grams. While slightly lighter than genuine, it is significantly heavier than standard 904L steel clones (~140g), providing a highly convincing tactile experience on the wrist.
Q: Does the Dandong 4131 movement support all original chronograph functions?
A: Yes. The Dandong 4131 is a 1:1 super clone caliber that features a fully functional column wheel and vertical clutch. The sub-dials correctly track running seconds at 6 o’clock, chronograph minutes at 3 o’clock, and chronograph hours at 9 o’clock.
Q: Is the Everose gold tone accurate, and will it fade?
A: QF has calibrated their plating bath to closely match Rolex’s proprietary Everose alloy, achieving the correct warm, slightly coppery tone. Modern PVD/DLC plating is highly durable for daily wear, but it is not solid gold; exposure to harsh chemicals or deep abrasions can compromise the finish over time.
Q: What is the main technical limitation of this specific QF release?
A: The primary limitation lies in the nature of the tungsten core. Because tungsten is extremely hard and difficult to machine, the internal case tolerances are slightly different from standard steel cases. This does not affect exterior visual accuracy, but it means standard aftermarket replacement parts (like genuine bezels or crystals) may require modification to fit perfectly.
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