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Description
BBSF Audemars Piguet Royal Oak Perpetual Calendar 26607BC
BBSF achieves a notable 11.4mm thickness and 180g mass, offering a structurally sound alternative to the genuine white gold perpetual calendar.
Powered by Clone Caliber 5134
The clone 5134 movement represents a significant technical leap over previous modified Miyota or ETA bases. By integrating the calendar module directly into the mainplate architecture, BBSF engineers managed to reduce the overall caliber height. This allows the case to sit at a verified 11.4mm, avoiding the disproportionate thickness found in earlier iterations. The mechanism supports all four subdial functions, requiring careful adjustment via the recessed case pushers.
Standard clone base movements equipped with complex calendar modules typically yield 卤8��15 s/day. Regular servicing is recommended to maintain optimal amplitude given the module��s drag.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Day, date, month, leap year indicator, and moonphase
- �� Winding Direction: Unidirectional
Technical Specifications
41mm diameter, verified 11.4mm thickness, and a substantial 180g weight designed to mimic the heft of the genuine white gold reference. The signature brushed and polished alternating finishing is executed with high fidelity.
Sharp guilloch茅 squares with precise concentric circular snailing on the subdials. The dial typography remains crisp under magnification, and the moonphase disc presents accurate metallic star detailing.
Features the iconic octagonal geometry with eight precisely aligned, white gold-plated hexagonal screws. The polished chamfers exhibit sharp transitions into the vertically brushed flat surfaces.
The links articulate smoothly without excessive lateral play. The double deployant AP folding clasp engages securely, featuring correct internal engravings and a well-machined release mechanism.
Why BBSF for This Reference?
Many collectors ask: ��Why not APSF?��
While APSF is renowned for their standard 15500 and 26240 models, BBSF has heavily invested in the 5134 perpetual calendar module. The primary advantage of the BBSF lies in its verified 11.4mm case thickness and the 180g weighted feel, which provides a more authentic wrist presence compared to lighter alternatives that fail to capture the density of the 26607BC��s genuine white gold.
Full Disclosure: The moonphase disc, while visually accurate, rotates as a standard 31-day day/night indicator rather than a true 29.5-day synodic lunar cycle.
Data Sheet
| MODEL REFERENCE | 26607BC.OO.1220BC.02 |
| FACTORY / VERSION | BBSF Edition |
| MOVEMENT | Clone Caliber 5134 Automatic |
| CASE MATERIAL | Stainless Steel (Weighted) |
| WEIGHT & THICKNESS | 180g | 11.4mm |
| CRYSTAL & LUME | Sapphire with AR | Swiss Super-LumiNova |
| DIMENSIONS | 41mm � 51mm � 11.4mmManual measurements �� minor tolerances apply. |
| WATER RESISTANCE | 30m stated rating �� professional pressure test recommended before swimming |
Collector Q&A
Q: How does the 180g weight of the BBSF compare to the genuine 26607BC?
A: The genuine 26607BC is crafted from solid 18k white gold, weighing over 200g. The BBSF utilizes a weighted stainless steel construction to reach 180g, bridging the gap significantly compared to standard 160g steel replicas, though it remains slightly lighter than solid gold.
Q: Are all the subdials on the clone 5134 movement fully functional?
A: Yes, the day, date, month, and moonphase subdials are functional and can be adjusted using the recessed pushers on the side of the case. However, care must be taken never to adjust these functions between 9:00 PM and 3:00 AM to prevent damage to the calendar module.
Q: Is the 11.4mm thickness accurate to the genuine Audemars Piguet?
A: The genuine caliber 5134 allows the authentic watch to sit at an ultra-thin 9.5mm. The BBSF measures 11.4mm due to the inherent constraints of the clone movement and added calendar module. While 1.9mm thicker, it still wears comfortably and is significantly thinner than earlier 13mm+ iterations.
Q: What is the primary limitation of the BBSF Perpetual Calendar mechanism?
A: The most notable limitation is the moonphase indicator. In this clone movement, the moon disc is tied to a 31-day cycle rather than a true 29.5-day lunar cycle. It functions effectively as a day/night and monthly indicator but will require manual correction to match the actual lunar phase over time.
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