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Description
N1 Factory OMEGA Seamaster Diver 300M Chronograph 44mm (Sedna Gold)
N1F delivers a mechanically viable Co-Axial aesthetic while achieving the highly scrutinized 16.5mm profile.
Powered by Clone Calibre 9900 (7750 Base)
Replicating the in-house OMEGA 9900 is an engineering challenge due to the specific subdial layout. N1 Factory utilizes a highly modified Asian 7750 chronograph architecture, utilizing custom transfer gears to mirror the functionality of the genuine movement. The decorative plates and blackened screws are applied to simulate the Co-Axial Master Chronometer aesthetics, while the module successfully supports the stacked 12-hour and 60-minute hands at the 3 o��clock position.
Due to the heavy modifications on the 7750 base to support the dual-hand subdial, typical accuracy is regulated to 卤10��15 s/day. Chronograph engagement is firm, characteristic of cam-actuated mechanisms.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Stacked 12-hour/60-minute chronograph subdial, running seconds, date display
- �� Winding Direction: Unidirectional (counter-clockwise rotor free-spin)
Technical Specifications
The 44mm case features a precise 16.5mm thickness and yields a substantial 227.4g total weight. The Sedna Gold plating is applied to the bezel ring, helium escape valve, crown, and bracelet mid-links.
The black dial is crafted from polished ceramic, featuring deep laser-ablated waves. Super-LumiNova application on the raised indices ensures distinct blue/green emission.
The unidirectional rotating bezel features a black ceramic insert with diving scales rendered in a Ceragold�� tone, matching the warmth of the Sedna Gold case elements.
A heavy five-link bracelet construction with alternating brushed and polished finishes. The deployant clasp features micro-adjustment tolerances suitable for daily wear.
Why N1 Factory for This Reference?
Many collectors ask: ��Why not OMF?��
Older OMF versions of this chronograph struggled with stuttering transfer gears and often missed the exact thickness target. N1 Factory utilizes an improved gear train to smooth the sweep and refines the case profile to exactly 16.5mm, making it structurally superior for this specific reference.
Full Disclosure: The reliance on a 7750 base means the rotor is unidirectional, resulting in noticeable freewheeling noise not present in the genuine METAS-certified caliber.
LIVE PREVIEW
Data Sheet
| MODEL REFERENCE | 210.20.44.51.01.001 |
| FACTORY / VERSION | N1 Factory Edition |
| MOVEMENT | Clone Calibre 9900 (7750 Base) |
| CASE MATERIAL | 316L Stainless Steel & 18K Sedna Gold Plate |
| WEIGHT & THICKNESS | 227.4g | 16.5mm |
| CRYSTAL & LUME | Sapphire with Dual-side AR | Super-LumiNova |
| DIMENSIONS | 44mm � 52.5mm � 16.5mmManual measurements �� minor tolerances apply. |
| WATER RESISTANCE | 30m stated �� professional pressure test recommended before swimming |
Collector Q&A
Q: Does the 3 o��clock subdial function exactly like the genuine Calibre 9900?
A: Yes, the N1 Factory utilizes a highly modified 7750 base to ensure both the 12-hour and 60-minute hands on the 3 o��clock subdial are fully functional and stacked correctly.
Q: Is the 18K Sedna Gold plating prone to fading?
A: The factory uses an advanced PVD plating process for the Sedna Gold elements. While durable for daily wear, it will eventually show wear if exposed to harsh chemicals or deep scratches, unlike solid gold.
Q: How does the weight compare to the genuine model?
A: This N1F replica weighs exactly 227.4g on the full two-tone bracelet, providing a substantial physical presence that closely mimics the heavy-hitter feel of the authentic piece.
Q: What is the main drawback of the 7750-based Clone 9900 movement?
A: Because it relies on a unidirectional winding 7750 architecture, rotor freewheeling noise is more noticeable than on the genuine Co-Axial escapement, and the power reserve is limited to approximately 36 hours.
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