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Description
BF Rolex Day-Date “Land-Dweller” M127336-0001
An experimental prototype replica demonstrating BF’s capability in machining ultra-thin 9.6mm cases and complex 3D dial textures.
Powered by Clone Caliber 7135
The mechanical core of this test version is the Clone 7135, a specialized movement designed to replicate the visual and mechanical properties of the Rolex 3255 caliber. It features a 1:1 engraved rotor, a functional balance bridge, and perlage finishing across the mainplates. While it mimics the genuine architecture visually, it operates on a more standard gear train layout, ensuring reliable daily performance while maintaining a slim profile necessary to achieve the 9.6mm case specification.
Factory tested to ±10 seconds/day. As an experimental batch movement, tolerances are slightly wider than established Dandong calibers, prioritizing structural fitment over chronometric perfection.
- ✅ Power Reserve: Approximately 36 hours
- ✅ Complications: Hours, minutes, seconds, and date
- ✅ Winding Direction: Bidirectional
Technical Specifications
The 40mm case is remarkably refined, achieving a verified thickness of just 9.6mm. The alternating brushed and polished surfaces are executed with tight tolerances.
Features a 3D textured honeycomb pattern with applied markers. The deep blue undertones shift dynamically under varied lighting conditions.
Machined from 904L steel rather than white gold, yet polished to a high luster that mimics the precious metal’s signature light refraction.
Solid 904L links with a concealed folding Crownclasp. The five-piece link construction offers excellent articulation and a total balanced weight of 145.0g.
Why BF for This Reference?
Many collectors ask: “Why not wait for a mainstream factory release?”
BF is currently the sole manufacturer experimenting with this unreleased M127336-0001 concept. Their ability to compress the case architecture down to a verified 9.6mm while maintaining a robust 145g weight profile is a significant technical achievement that larger factories have yet to attempt on fantasy or prototype models.
Full Disclosure: Because this is a test version of an unreleased design, the honeycomb dial texture depth lacks a finalized genuine counterpart for precise 1:1 comparison, and long-term parts availability for the 7135 caliber remains unproven.
Data Sheet
| MODEL REFERENCE | M127336-0001 “Land-Dweller” |
| FACTORY / VERSION | BF Test Version |
| MOVEMENT | Clone 7135 (3255 Base) |
| CASE MATERIAL | Solid 904L Oystersteel |
| WEIGHT & THICKNESS | 145.0g | 9.6mm |
| CRYSTAL & LUME | Sapphire with Cyclops | Chromalight |
| DIMENSIONS | 40mm × ~47.5mm × 9.6mmManual measurements — minor tolerances apply. |
| WATER RESISTANCE | 30m stated — professional pressure test recommended before swimming |
Collector Q&A
Q: Is the M127336-0001 ‘Land-Dweller’ a standard catalog Rolex model?
A: No. It is an experimental or fantasy concept piece built on the 40mm Day-Date architecture, featuring an unreleased ice-blue honeycomb dial currently in factory testing.
Q: Does the BF 7135 clone movement accept genuine Rolex 3255 parts?
A: No. While it mimics the visual layout and functions of the caliber 3255, the internal dimensions and gear train of the 7135 differ, meaning genuine parts are not drop-in replacements.
Q: How accurate is the 9.6mm case thickness on this BF release?
A: The 9.6mm measurement is manually verified and highly accurate for this batch. BF achieved this slim profile by utilizing the 7135 movement, allowing the watch to wear exceptionally flat compared to standard replica Day-Date cases.
Q: What is the primary technical limitation of this BF test version?
A: Because it is a prototype batch of an unreleased design, the honeycomb dial texture depth lacks a finalized genuine counterpart for 1:1 comparison, and long-term parts availability for the experimental 7135 caliber remains unproven.
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