BT Factory Edition — Oyster Bracelet
The reference 116520 represents the pinnacle of pre-ceramic Rolex chronographs, and this BT Factory (BTF) edition captures its nuanced architecture with clinical precision. Recognized among horological enthusiasts for resolving the case thickness discrepancies of earlier replicas, this iteration achieves the correct 12.2mm profile. The integration of the metallic ‘frozen’ textured sub-dials demonstrates a strict adherence to the genuine aesthetic.
At the core of this reference is the Dandong 4130 clone caliber, a vertical clutch chronograph movement that operates with exceptional smoothness. Unlike modified base movements, this dedicated architecture allows for correct sub-dial spacing and pusher feel. Power reserve is rated at approximately 36 hours, ensuring consistent amplitude during daily wear. The mechanism is devoid of superficial decorative plates, focusing entirely on functional replication.
Constructed from solid 904L Oystersteel, the 40mm case features a highly accurate lug profile and a sharp tachymeter bezel filled with black enamel. The white gloss lacquer dial is accented by silver-rimmed sub-dials and applied markers treated with blue Chromalight. The Oyster bracelet is finished with alternating brushed and polished surfaces, culminating in a precisely machined folding clasp.
- Movement: Dandong 4130 Super Clone — Approximately 36 hours
- Case Material: 904L Oystersteel, 40mm diameter, 46.5mm lug-to-lug, ~140g weight
- Bezel: 904L Steel Tachymeter, correct deep engraving with black enamel
- Crystal: Sapphire with correct height and anti-reflective coating
- Bracelet: 904L Oystersteel, brushed/polished finish, Oysterlock clasp with Easylink
- Water Resistance: 30m rating — professional pressure test recommended before swimming. Do not operate chronograph pushers or the crown while the watch is submerged.
Designed for the purist collector, this pre-ceramic Daytona offers a versatile, understated aesthetic compared to its modern ceramic counterparts. It transitions seamlessly from formal environments to casual settings.




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