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Description
ZF Vacheron Constantin Overseas Perpetual Calendar 4300V
A highly stable, pragmatic interpretation of the ultimate sports complication, utilizing trusted Japanese base mechanics.
Powered by Modified Cal. 1120 QP/1 (Miyota Base)
Rather than attempting to clone the ultra-thin Vacheron Constantin 1120 QP/1 from the ground up—a process that often results in fragile, unserviceable mechanisms—ZF factory opted for a heavily modified Miyota 9015. This base caliber is fitted with a custom calendar module to drive the dial displays, while the rear features elaborate decorative plates and a skeletonized 22k-style rotor to mimic the genuine aesthetics. The unidirectional winding system ensures reliable mainspring tension during daily wear.
Rated at ±15 seconds per day. The Miyota 9015 base operates at 28,800 vph (4Hz), providing a smooth sweep and highly stable timing that can easily be regulated by any competent watchsmith.
- ✅ Power Reserve: Approximately 36 hours
- ✅ Complications: Day, Date, Month, and Moonphase displays
- ✅ Winding Direction: Unidirectional (Clockwise)
Technical Specifications
The 41.5mm case features the signature tonneau shape with pronounced brushed surfaces and high-polish chamfers. Due to the modular movement, the case thickness is approximately 10.5mm, slightly thicker than the ultra-thin genuine.
Exhibits a deep, dynamic radial finish. The sub-dials feature precise concentric snailing, and the applied white gold-style indices are filled with responsive Super-LumiNova for low-light legibility.
The fixed bezel precisely mirrors the brand’s iconic six-sided Maltese cross design, featuring a circular brushed top surface contrasting against highly polished vertical flanks.
Constructed with solid links that echo the Maltese cross motif. The tolerances at the lug integration are tight, secured by a smooth dual-deployant butterfly clasp.
Why ZF for This Reference?
Many collectors ask: “Why not other factories?”
ZF remains the definitive choice for the 4300V because they successfully balanced visual complexity with mechanical reliability. While other factories have struggled with high failure rates on complex calendar clones, ZF’s decision to use a modular Miyota 9015 ensures that the watch will run consistently for years with minimal servicing requirements.
Full Disclosure: Because it utilizes a modular plate over a standard base caliber, this replica is noticeably thicker (approx. 10.5mm) than the genuine reference (8.1mm), and the calendar functions require manual advancement rather than operating as a true perpetual mechanism.
Data Sheet
| MODEL REFERENCE | Overseas Perpetual Calendar 4300V/120G-B102 |
| FACTORY / VERSION | ZF Edition |
| MOVEMENT | Modified Miyota 9015 (Cal. 1120 QP/1 Deco) |
| CASE MATERIAL | 316L Stainless Steel |
| WEIGHT & THICKNESS | Approx. 160g | 10.5mm |
| CRYSTAL & LUME | Sapphire with Colorless AR | Super-LumiNova |
| DIMENSIONS | 41.5mm × 49.5mm × 10.5mmManual measurements — minor tolerances apply. |
| WATER RESISTANCE | 30m stated rating — professional pressure test recommended before swimming |
Collector Q&A
Q: Does the perpetual calendar function automatically adjust for leap years like the genuine Caliber 1120 QP/1?
A: No. The ZF edition utilizes a modified Miyota 9015 with a calendar module. It functions as a complete calendar, requiring manual advancement via the case pushers for months with fewer than 31 days.
Q: How does the case thickness compare to the genuine Vacheron Constantin 4300V?
A: The genuine reference is renowned for its ultra-thin 8.1mm profile. Due to the modular construction required to stack calendar functions over the Miyota base, the ZF version measures approximately 10.5mm thick.
Q: Does the integrated steel bracelet feature the quick-release system found on the genuine Overseas?
A: The ZF factory bracelet is fixed via standard screwed pins to the case lugs. It does not replicate the proprietary push-button quick-release mechanism of the genuine piece.
Q: Is the rotor noise noticeable on this specific Miyota-based movement?
A: Because it relies on a Miyota 9015 base caliber, the unidirectional winding rotor can be audible during rapid wrist movement. Many collectors choose to have the rotor bearing lightly silenced with Moebius 9010 oil post-purchase.
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