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Description
BBSF Audemars Piguet Royal Oak Perpetual Calendar 26574OR
A highly proficient execution of a complex calendar layout, balancing functional sub-dials with a constrained case thickness.
Powered by Clone Caliber 5134
The engine inside this BBSF release is a heavily modified base movement engineered to replicate the Audemars Piguet Caliber 5134. It successfully routes power to four distinct sub-dials, operating the day, date, month, leap year, and moonphase displays. While the underlying architecture relies on a standard high-beat escapement rather than the genuine ultra-thin perpetual mechanics, the visual result on the dial side is exceptionally faithful to the authentic reference.
Due to the friction added by the multiple calendar modules, this clone caliber is typically regulated to operate within 卤10��15 seconds per day. Consistent daily winding is recommended to maintain optimal amplitude.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Day, date, month, leap year indicator, and moonphase
- �� Winding Direction: Bidirectional
Technical Specifications
Weighing 186.1g, the case features the crucial brushed/polished alternating finishing on the chamfers. The 11.4mm thickness is a necessary compromise for the complication module.
Features sharp concentric snailing on the sub-dials and accurate warm rose gold-toned hands and indices. The tapisserie squares reflect light dynamically.
Secured by eight recessed, polished white gold-plated hexagonal screws. The vertical brushing on the bezel face is deep and uniform.
The links taper correctly toward the double deployant clasp. Articulation is smooth, avoiding the stiffness found in lower-tier Royal Oak replicas.
Why BBSF for This Reference?
Many collectors ask: ��Why not APSF?��
While APSF is the undisputed benchmark for standard three-hand Royal Oak models (such as the 15500 and 15400) due to their superior Caliber 4302/3120 clones, the highly complicated 26574 perpetual calendar requires a different approach. BBSF specializes in this specific multi-sub-dial architecture, providing a reliable calendar module that functions via the case pushers while keeping the overall thickness down to an acceptable 11.4mm.
Full Disclosure: The leap year and month pushers on the side of the case require deliberate, firm actuation. Pressing them lightly or off-angle can cause the internal levers to skip, requiring a full manual cycle to reset the alignment.
LIVE PREVIEW
Data Sheet
| MODEL REFERENCE | 26574OR.OO.1220OR.03 |
| FACTORY / VERSION | BBSF Edition |
| MOVEMENT | Clone Caliber 5134 |
| CASE MATERIAL | Rose Gold Plated Stainless Steel |
| WEIGHT & THICKNESS | 186.1g | 11.4mm |
| CRYSTAL & LUME | Sapphire with AR coating | Super-LumiNova |
| DIMENSIONS | 41.0mm � 51.5mm � 11.4mmManual measurements �� minor tolerances apply. |
| WATER RESISTANCE | 30m stated �� professional pressure test recommended before swimming |
Collector Q&A
Q: Do all the sub-dials on this BBSF 26574OR function like the genuine Caliber 5134?
A: Yes, the day, date, month, leap year, and moonphase indicators are fully functional via the recessed case pushers. However, it operates as a standard multi-function calendar rather than a true mechanical perpetual memory, meaning it requires manual correction at the end of months with fewer than 31 days.
Q: How does the 11.4mm thickness compare to the genuine AP reference?
A: The genuine 26574OR measures an ultra-thin 9.5mm. The BBSF replica is 11.4mm thick to accommodate the clone complication module. While slightly thicker, it maintains the correct case proportions and wears comfortably on the wrist without appearing bloated.
Q: Is the weight of 186.1g accurate to the solid rose gold authentic piece?
A: No. The genuine piece is crafted from solid 18k rose gold and weighs significantly more. The 186.1g weight of this BBSF replica is substantial for plated steel and feels premium, but it will feel noticeably lighter than the authentic precious metal version.
Q: What is the main known quirk of the BBSF perpetual calendar module?
A: The primary quirk involves the date transition mechanism. Engaging the quick-set case pushers between 9:00 PM and 3:00 AM can damage the delicate internal gears of the complication module. Always advance the time to 6:00 (AM or PM) before using the pushers to adjust any calendar functions.
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