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Description
BT Factory Rolex Cosmograph Daytona 116520 White Dial
A technically proficient replication of the pre-ceramic steel legend, distinguished by its 12.2mm case profile and vertical clutch architecture.
Powered by Dandong 4130
The Dandong 4130 stands as a benchmark in replica horology, engineered specifically to mirror the dimensions and functionality of the genuine Rolex caliber. By utilizing a native column wheel and vertical clutch system, it ensures the chronograph engages without the visual stutter common in modular movements. This slim architecture is precisely what allows the case to maintain its historically accurate 12.2mm thickness. Every unit undergoes evaluation against to verify pusher crispness and amplitude stability.
Regulated to approximately 卤3��5 seconds per day, consistent with high-tier Dandong chronometer-grade output.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Center hour/minute, small seconds at 6 o��clock, 12-hour chronograph
- �� Winding Direction: Bidirectional automatic winding
Technical Specifications
Machined to exactly 40mm in diameter and 12.2mm thick, featuring a high-polish finish on the case sides and lugs that closely mimics genuine factory finishing.
A stark, bright white dial contrasted by metallic ��frozen�� silver sub-dial rings. Text is slightly raised for a 3D effect, complemented by blue Chromalight luminescent markers.
Crafted from solid 904L steel with deep, sharp engravings. The numerals are correctly filled with black enamel paint, providing excellent legibility and historic accuracy.
Features solid end links with tight case integration. The Oysterlock safety clasp includes a functional Easylink 5mm comfort extension link with minimal endplay.
Why BT Factory for This Reference?
Many collectors ask: ��Why not Clean Factory?��
While Clean Factory produces an excellent Daytona, BT Factory (BTF) is often preferred for the 116520 reference due to its superior sapphire crystal clarity and slightly sharper case lug profile. The BTF crystal lacks the milky edge occasionally seen on competing versions, allowing the intricate ��frozen�� texture of the sub-dials to be viewed without distortion.
Full Disclosure: The raised 3D printing on the dial text is slightly thicker than genuine, which is visible under high magnification.
LIVE PREVIEW
Data Sheet
| MODEL REFERENCE | 116520-78590 |
| FACTORY / VERSION | BT Factory (BTF) Ultimate Edition |
| MOVEMENT | Dandong 4130 Super Clone |
| CASE MATERIAL | 904L Oystersteel |
| WEIGHT & THICKNESS | ~140g | 12.2mm |
| CRYSTAL & LUME | Sapphire with AR | Blue Chromalight |
| DIMENSIONS | 40mm � 46.5mm � 12.2mmManual measurements �� minor tolerances apply. |
| WATER RESISTANCE | 30m �� professional pressure test recommended before swimming |
Collector Q&A
Q: Does the Dandong 4130 movement support full chronograph functionality?
A: Yes, the Dandong 4130 features a fully functional chronograph with a vertical clutch and column wheel, replicating the exact operation and pusher feel of the genuine caliber.
Q: How does the BTF steel bezel compare to the genuine 116520?
A: BT Factory utilizes solid 904L Oystersteel with deep, sharp engravings filled with black enamel, closely matching the pre-ceramic tachymeter specifications.
Q: Are the sub-dials the correct texture?
A: Yes, BTF specifically engineered the silver rings on the sub-dials to exhibit the correct metallic ��frozen�� texture, avoiding the flat silver paint found on lower-tier replicas.
Q: What is the main technical flaw with this specific BTF release?
A: While the case profile and crystal clarity are exceptional, the raised 3D effect of the dial text can appear slightly more pronounced under macro magnification than the genuine dial.
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