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Description
ZF Audemars Piguet Royal Oak 15451ST 37mm
A highly capable mid-size execution featuring accurate dial tonality and precise gem-setting geometry.
At the Core �� ZF Custom Caliber 3120
The mechanism driving this 37mm reference is the ZF Custom Caliber 3120. To maintain the strict 9.8mm case thickness required by the 15450/15451 series, ZF utilizes a reliable Japanese base movement overlaid with meticulously engraved decorative bridges. This approach allows for the inclusion of a 22K gold-toned rotor bearing the AP crest, while ensuring long-term mechanical stability. Every piece is evaluated against prior to dispatch.
Regulated to operate within 卤10��15 seconds per day, consistent with high-beat Japanese base architectures.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Center hours, minutes, seconds, and rapid-set date
- �� Winding Direction: Unidirectional
Technical Specifications
The case measures exactly 37mm in diameter with a 9.8mm thickness. The alternating brushed and polished finishing on the octagonal bezel and case flanks adheres closely to genuine specifications.
Featuring the iconic square pattern, the dial exhibits a deep slate blue hue. The applied white gold-toned hour markers are filled with luminescent compound for low-light legibility.
The bezel is set with synthetic stones that replicate the factory diamond arrangement. The setting is secure, with prong geometry that minimizes visible metal between the stones.
The articulating links feature pronounced chamfers. The double-deployant clasp operates with crisp tension and displays accurate internal engravings.
ZF vs. the Alternatives
One recurring question: ��Why not APSF?��
While APSF produces an exceptional clone 3120 movement for their 15450/15451 series, ZF is frequently preferred for this specific blue dial variant. The ZF dial captures the nuanced, dynamic shift of the genuine blue lacquer more accurately than early APSF batches, which tended to lean slightly too purple under direct lighting.
Full Disclosure: Because the ZF Custom Caliber 3120 utilizes a unidirectional winding base, the rotor can be audibly noticeable in quiet environments��a known quirk of this specific architecture.
LIVE PREVIEW
Reference Data
| MODEL REFERENCE | 15451ST.OO.1220ST.01 |
| FACTORY / VERSION | ZF Edition |
| MOVEMENT | ZF Custom Caliber 3120 |
| CASE MATERIAL | 316L Stainless Steel |
| WEIGHT & THICKNESS | Approx. 135g | 9.8mm |
| CRYSTAL & LUME | Sapphire with AR | Super-LumiNova |
| DIMENSIONS | 37.0mm � 47.0mm � 9.8mmDimensions are taken manually and may vary slightly. |
| WATER RESISTANCE | 30m stated �� we advise a professional pressure test before any water exposure |
Related References
Questions from Collectors
Q: How does the gem-set bezel on the ZF 15451ST compare to the genuine AP?
A: ZF uses high-grade synthetic stones meticulously set into the 316L steel bezel. While they lack the exact refractive index of genuine factory diamonds, the setting geometry and prong alignment closely mirror the authentic piece, minimizing visible metal between the stones.
Q: Is the blue dial color accurate to the genuine 15451ST?
A: ZF has achieved a highly commendable slate blue sunburst effect on this reference. Under direct light, it exhibits the correct dynamic shift, avoiding the overly purple or flat blue tones sometimes seen in earlier replica batches.
Q: Will the integrated bracelet fit a smaller wrist?
A: Yes, the 37mm case paired with the steeply angled articulating links makes it ideal for wrists down to 6.0 inches. Links can be removed via standard screwed pins to achieve a precise fit.
Q: Is the movement rotor noisy on this ZF model?
A: Yes, because the ZF Caliber 3120 utilizes a modified Japanese base with unidirectional winding, the rotor can be audible in quiet environments. Many collectors opt to have the rotor bearing lightly oiled by a watchsmith to dampen this sound.
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