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Description
ZF Audemars Piguet Royal Oak Selfwinding 77350ST 34mm
A precisely engineered mid-size Royal Oak, distinguished by its dedicated Calibre 5800 clone and accurate bracelet articulation.
Powered by Custom Calibre 5800 Clone
The mechanical foundation of this 77350ST is the ZF-developed Calibre 5800 clone. Unlike earlier mid-size replicas that forced standard movements into smaller cases, this caliber is specifically scaled for the 34mm architecture. Beating at 28,800 vibrations per hour, it features 186 intricately finished components and a custom-decorated rotor that closely mimics genuine AP finishing standards. The movement provides a stable torque curve to maintain amplitude across its winding phase.
Regulated to 卤10��15 seconds per day. A deviation within this range is standard for this specific clone movement architecture, ensuring reliable daily performance.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Center hours, minutes, sweeping seconds, and quick-set date display at 3 o��clock
- �� Winding Direction: Unidirectional winding rotor
Technical Specifications
Constructed with a 34mm diameter and a verified 9.6mm thickness. The case exhibits the correct ratio of brushed surfaces to polished bevels, weighing exactly 115.4g.
Features accurate square texturing with a deep blue (#003A70) hue. The white gold-toned applied hour-markers and Royal Oak hands are treated with luminescent coating.
Secured by eight polished hexagonal screws. The vertical brushing on the bezel face aligns correctly with the case, bordered by a sharp polished chamfer.
The integrated bracelet features alternating brushed and polished finishing on the links and studs, securing with an AP double folding clasp with minimal endplay tolerance.
Why ZF for This Reference?
Many collectors ask: ��Why not 8F or BF?��
ZF remains the definitive choice for the 34mm 77350ST due to its dedicated movement architecture. While other factories often utilize thicker off-the-shelf movements that distort the case profile and sink the date wheel, ZF��s Calibre 5800 clone allows for correct date positioning and a refined 9.6mm thickness. The bracelet articulation is also notably superior, draping closer to genuine specifications.
Full Disclosure: The primary critique of this model is rotor noise; the winding mechanism can be slightly audible in quiet environments, and the blue dial sunburst effect can appear marginally more reflective than the genuine Bleu Nuit under harsh direct lighting.
LIVE PREVIEW
Data Sheet
| MODEL REFERENCE | 77350ST.OO.1261ST.01 |
| FACTORY / VERSION | ZF Edition |
| MOVEMENT | Custom Calibre 5800 Clone |
| CASE MATERIAL | 316L Stainless Steel |
| WEIGHT & THICKNESS | 115.4g | 9.6mm |
| CRYSTAL & LUME | Sapphire with AR Coating | Standard Super-LumiNova |
| DIMENSIONS | 34mm � 43mm � 9.6mmManual measurements �� minor tolerances apply. |
| WATER RESISTANCE | Stated 50m �� professional pressure test recommended before swimming |
Collector Q&A
Q: Does the ZF 77350ST use a modified Miyota 9015 or a dedicated clone?
A: ZF utilizes a custom Calibre 5800 clone specifically developed for the 34mm architecture, distinguishing it from older releases that relied on standard Miyota 9015 movements with decorative plates. This allows for correct date wheel positioning.
Q: How does the 9.6mm case thickness compare to the genuine AP?
A: The verified thickness of this ZF replica is 9.6mm, which is structurally accurate for housing the 5800 clone movement, though it is marginally thicker than the genuine 77350ST��s 8.8mm profile.
Q: Will the integrated bracelet fit smaller wrists comfortably?
A: Yes, the 34mm case diameter paired with the specific lug articulation of the ZF bracelet is highly suitable for wrists down to 5.5 inches, offering better ergonomics and less overhang than the 37mm 15450.
Q: What is the primary known flaw of this specific ZF 34mm release?
A: The primary critique lies in the rotor noise. Like many clone movements, the Calibre 5800��s winding rotor can be audible in quiet environments. Additionally, the blue dial tone may exhibit a slightly higher saturation under direct sunlight compared to the genuine Bleu Nuit.