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Description
Q-Factory V9 Rolex Daytona Le Mans 126529LN �� 174g Ultra-Weight Edition
A mechanical achievement that bridges the tactile gap between steel and 18k white gold through verified 174g tungsten-core architecture, a free-sprung JH4132-FS chronograph caliber, and the correct sapphire exhibition caseback �� three elements no other Daytona super clone addresses simultaneously.
JH4132-FS �� Free-Sprung Calibre 4132 Clone
The Q-Factory V9 is powered by the JH4132-FS: an SH-base movement modified with an independent free-sprung balance wheel and architecturally correct bridge geometry to replicate the genuine Calibre 4132. This distinction is not cosmetic. The 126529LN is the only modern Daytona with a sapphire exhibition caseback �� meaning the movement is always on display. A standard regulated balance (with visible regulator pins) is an immediate tell through the caseback. The free-sprung architecture eliminates this entirely.
The dedicated gear train correctly converts the 9 o��clock totalizer into a true 24-hour endurance counter �� the defining complication of the Le Mans reference �� rather than the 12-hour subdial found in all standard 4130 Daytona clones. Each movement undergoes testing against prior to dispatch.
�� Independent Timegrapher Results
Seconds / Day
Amplitude
Beat Error
Results recorded from a production unit. Individual results will vary.
- �� Free-Sprung Balance: Eliminates visible regulator pins through the sapphire caseback
- �� 24-Hour Counter: Correct gearing for Le Mans specification at 9 o��clock
- �� Power Reserve: Approximately 36 hours
- �� Complications: 24-hour chronograph counter, central chronograph seconds, running small seconds
- �� Winding Direction: Bidirectional
Technical Specifications
High-Density Alloy / 904L Steel
39.1mm diameter, 47.6mm lug-to-lug, 11.8mm thickness �� caliper-measured. Alternating brushed and polished surfaces with sapphire exhibition caseback, correct to the genuine 126529LN specification.
Reverse Panda / Pearlescent Subdials
Vintage-inspired ��Paul Newman�� square-tipped hash marks on the subdials. Indices and hands filled with blue-emitting Chromalight for consistent low-light legibility.
Black Cerachrom Ceramic
Ceramic insert with platinum-dust tachymeter numerals. The centenary ��100�� marker is filled with a distinct red ceramic pigment �� not painted, not PVD. Fixed tachymeter scale.
Tungsten-Core Oyster / Oysterlock Clasp
The polished center links use a stainless steel shell encasing a solid tungsten core �� delivering weight without compromising the white gold PVD plating adhesion. Oysterlock safety clasp with 5mm Easylink extension.
Why Q-Factory V9 for This Reference?
Many collectors ask: ��Why not Clean Factory?��
The 126529LN demands three things no other factory has addressed together: correct weight, a caseback-visible free-sprung movement, and a transparent exhibition caseback. Clean Factory produces an exceptional 4132 movement but their standard 904L cases weigh roughly 140g �� instantly detectable upon handling. Q-Factory V9��s tungsten-core bracelet links and weighted case architecture achieve a scale-verified 174g, bridging the gap toward the genuine white gold piece at 200g+.
The free-sprung JH4132-FS is the second differentiator. Through the sapphire caseback, a standard regulated balance reveals itself immediately. The JH4132-FS matches the genuine Calibre 4132��s visual architecture precisely �� no regulator pins visible.
Full Disclosure: The high-density alloy exhibits a slightly colder metallic luster under direct sunlight compared to the warmer yellowish hue of genuine 18k white gold. At 174g versus the genuine��s 200g+, a marginal weight difference remains.
QF Daytona Le Mans V9 Full Review �� Movement, Weight Data & Buyer FAQ
Data Sheet
| MODEL REFERENCE | M126529LN |
| FACTORY / VERSION | Q-Factory V9 ��Ultra-Weight�� 2026 Edition |
| MOVEMENT | JH4132-FS �� Free-Sprung Calibre 4132 Clone |
| TIMEGRAPHER | 0 s/day �|� 329掳 Amplitude �|� 0.2ms Beat Error |
| CASE MATERIAL | 904L Oystersteel with Tungsten-Core High-Density Alloy |
| WEIGHT & THICKNESS | 174g (scale-verified) �|� 11.8mm |
| CRYSTAL & CASEBACK | Sapphire with AR Coating �|� Sapphire Exhibition Caseback |
| LUME | Chromalight (Blue) �� hands and applied indices |
| DIMENSIONS | 39.1mm � 47.6mm � 11.8mmCaliper-measured �� minor tolerances apply. |
| WATER RESISTANCE | 30m / 3 ATM �� professional pressure test recommended before swimming |
Collector Q&A
Q: Why does this Daytona have a sapphire caseback when standard Daytonas don��t?
A: The genuine 126529LN is the only modern Rolex Daytona released with an exhibition caseback �� made possible because the genuine Calibre 4132��s free-sprung balance wheel is visually distinctive and central to the watch��s identity. Q-Factory V9 correctly replicates this. Critically, the movement must also be correct: a standard regulated balance with visible regulator pins would be immediately identifiable as non-genuine through the sapphire crystal. The JH4132-FS free-sprung architecture eliminates this tell.
Q: Does the 9 o��clock subdial function as a 24-hour counter like the genuine Le Mans?
A: Yes. The JH4132-FS features the correct gearing to track a full 24 hours at the 9 o��clock position, differentiating it from all standard 12-hour Daytona 4130 clones. This is the defining complication of the Le Mans reference.
Q: How does the 174g weight compare to the genuine 126529LN?
A: The genuine 18k white gold model exceeds 200g depending on the number of bracelet links. Standard steel super clones of the Daytona weigh approximately 140g. At a scale-verified 174g, the Q-Factory V9 sits meaningfully between the two �� the concentrated density of the tungsten-core bracelet links produces a qualitatively different in-hand feel from simply adding case weight.
Q: How does Q-Factory achieve 174g without chipping or flaking the plating?
A: Previous tungsten-weighted replicas suffered from poor plating adhesion �� pure tungsten is notoriously difficult to galvanize. Q-Factory solves this by encasing the tungsten inside a stainless steel shell on each bracelet center link. The white gold PVD adheres to the steel surface, not to bare tungsten, ensuring the finish holds under long-term daily wear.
Q: Is the red ��100�� marker on the ceramic bezel painted or filled?
A: The commemorative red ��100�� indication is filled with ceramic-based pigment during the manufacturing process, ensuring it will not easily flake or fade compared to surface-painted alternatives.
Q: What is the main drawback of the weighted alloy case construction?
A: At 174g the V9 remains lighter than the genuine solid gold piece at 200g+. Additionally, the infused high-density alloy exhibits a slightly colder, more steel-like visual tone than the warmer yellowish hue of genuine 18k white gold. Both are disclosed trade-offs relative to the reference��s price point.