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Description
BBSF Audemars Piguet Royal Oak Tourbillon Extra-Thin 26512ST
A mechanically ambitious replica that delivers a functional rotating tourbillon at the expense of a slightly thicker case profile.
Powered by Calibre 2924 Clone
The core of this BBSF model is the hand-wound Calibre 2924 clone movement. Unlike standard replicas that utilize a simple exposed balance wheel, this mechanism features a true rotating tourbillon cage at the 6 o��clock position. The architecture mimics the genuine gear train layout, though the finishing on the bridges relies on machine-applied textures rather than traditional hand-beveled anglage. Because it is a manual-wind caliber, owners must establish a consistent winding routine to ensure the escapement receives adequate torque.
Standard tourbillon clone movements: 卤10��15 s/day. Positional variance is typically higher than standard automatic calibers due to the heavy tourbillon cage.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Functional rotating tourbillon, hours, minutes
- �� Winding Direction: Manual wind (Crown rotation)
Technical Specifications
The case construction measures 41mm in diameter with an estimated 10.5mm thickness, featuring a precise ratio of brushed flat surfaces to polished chamfers.
The dial exhibits a sharp petite tapisserie pattern. The tourbillon cutout at 6 o��clock is cleanly executed, though the surrounding text printing is slightly thicker than genuine.
Features the iconic octagonal design with eight recessed, polished white gold-plated hexagonal screws. The vertical brushing aligns correctly with the case.
Constructed with solid links and a double deployant clasp. The endplay tolerances are tight, providing a rigid and secure fit against the wrist.
Why BBSF for This Reference?
Many collectors ask: ��Why not R8F?��
While R8F produces highly regarded tourbillon replicas, the BBSF edition of the 26512ST is favored for its dial execution. The petite tapisserie squares on the BBSF model reflect light with a closer approximation to the genuine sunburst effect, and the manual-wind gear train exhibits stable amplitude when fully wound.
Full Disclosure: The case thickness is approximately 10.5mm, which noticeably deviates from the genuine extra-thin 8.85mm specification, a necessary compromise to house the clone tourbillon mechanism.
Data Sheet
| MODEL REFERENCE | 26512ST.OO.1220ST.01 |
| FACTORY / VERSION | BBSF Edition |
| MOVEMENT | Calibre 2924 Clone |
| CASE MATERIAL | 316L Stainless Steel |
| WEIGHT & THICKNESS | [unconfirmed] | 10.5mm |
| CRYSTAL & LUME | Scratch-resistant sapphire | Super-LumiNova |
| DIMENSIONS | 41mm � 50.5mm � 10.5mmManual measurements �� minor tolerances apply. |
| WATER RESISTANCE | 30m Stated �� professional pressure test recommended before swimming |
Collector Q&A
Q: Is the tourbillon on the BBSF 26512ST fully functional?
A: Yes, it is a true rotating tourbillon mechanism, not a static exposed balance wheel (open heart). The cage rotates continuously on its axis while the watch is running.
Q: How does the case thickness compare to the genuine AP?
A: The genuine 26512ST is classified as ��Extra-Thin�� with an 8.85mm profile. The BBSF replica is slightly thicker at approximately 10.5mm to accommodate the architecture of the clone tourbillon movement.
Q: Is the movement an automatic or manual wind?
A: It is a hand-wound Calibre 2924 clone. You must manually wind it via the crown to maintain the approximate 36-hour power reserve, as there is no rotor to generate power from wrist movement.
Q: What is the main visual flaw of this specific factory��s execution?
A: The hand-beveled anglage on the tourbillon cage and movement bridges is machine-finished rather than hand-polished. It lacks the sharp interior angles and mirror-like bevels found on the genuine piece.
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