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Description
APSF Audemars Piguet Royal Oak Perpetual Calendar 26579CS
The integration of the clone Calibre 5134 elevates this grand complication from a visual homage to a mechanically impressive replica.
Inside the Clone Calibre 5134
The customized Clone Calibre 5134 represents a major leap in replica horology for the Royal Oak line. By eliminating the reliance on the thicker Miyota 9015 base, APSF has successfully replicated the 11.4mm case profile of the genuine article. The movement supports a complex array of calendar functions, driven by a series of micro-gears connected to the recessed case pushers. While it operates more closely to a complete calendar than a true mechanical perpetual calendar, the visual layout and pusher functionality remain faithful to the original design.
This complex clone caliber is typically regulated to within 卤8��12 seconds per day, prioritizing the stability of the calendar module over extreme chronometric precision.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Day, date, month, moon phase, week indicator, and leap year cycle
- �� Winding Direction: Bidirectional
The Technical Breakdown
The 41mm case maintains the strict 11.4mm thickness of the genuine. The brushed surfaces exhibit a fine, directional grain, contrasting sharply with the highly polished chamfers along the lug hoods.
The dial features the iconic large checkered decoration. The three sub-dials and moon phase aperture are symmetrically distributed, with crisp typography and properly faceted, luminous hands.
Secured by eight white gold-plated hexagonal screws, the bezel sits flush against the mid-case. The vertical brushing aligns perfectly with the case and bracelet links.
The bracelet construction is a hallmark of APSF, offering excellent flexibility and minimal lateral play. It secures via a double-deployant AP folding clasp with crisp engravings.
Why APSF for This Reference?
A question that comes up often: ��Why not ZF?��
For the Royal Oak Perpetual Calendar, APSF is the definitive choice due to their proprietary clone 5134 movement. Older ZF versions relied on modified Miyota movements, which resulted in a noticeably thicker case profile and sunken date pinions. APSF achieves the correct 11.4mm thickness and proper hand-stack spacing.
One Caveat: The genuine 26579CS is constructed entirely from blue ceramic. This replica utilizes 316L stainless steel, which fundamentally alters the weight and tactile feel compared to the retail piece.
LIVE PREVIEW
At a Glance
| MODEL REFERENCE | 26579CS.OO.1225CS.01 |
| FACTORY / VERSION | APSF Edition |
| MOVEMENT | Clone Calibre 5134 Automatic |
| CASE MATERIAL | 316L Stainless Steel |
| WEIGHT & THICKNESS | 185g | 11.4mm |
| CRYSTAL & LUME | Sapphire with AR | Standard Green Luminous Coating |
| DIMENSIONS | 41mm � 11.4mmManual measurements �� minor tolerances apply. |
| WATER RESISTANCE | 30m stated rating �� a professional water-resistance check is recommended before submersion |
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What Buyers Ask
Q: Does the perpetual calendar function exactly like the genuine Calibre 5134?
A: While the sub-dials are fully functional, the clone 5134 operates closer to a complete calendar. The leap year and month typically require manual advancement, unlike the genuine mechanism which is mechanically programmed for 48-month cycles without intervention.
Q: Why is the case made of 316L stainless steel instead of blue ceramic?
A: Machining full blue ceramic to the exact tolerances of the Royal Oak case and integrated bracelet remains highly complex and cost-prohibitive for replica factories. 316L steel is used here to maintain structural integrity and achieve the correct 11.4mm profile.
Q: How do I adjust the moon phase and calendar sub-dials?
A: Adjustments are made via the recessed pushers on the side of the case. Always use a proper wooden or plastic stylus to avoid scratching the steel case, and never adjust the calendar complications between 9:00 PM and 3:00 AM to prevent damage to the gear train.
Q: Are the week indicator numbers on the inner bezel functional?
A: Yes, the central pointer hand advances to indicate the current week of the year. However, its alignment can sometimes exhibit slight play depending on the specific batch, which is a known quirk of the clone 5134 movement.
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