先看一下官方的参数：
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- Case Diameter: 45 mm
Case Thickness: 15.5 mm
Case Material: Stainless Steel
Dial Color: Black
Dial Shape: Round
Dial Material: Not specified
Crystal: Sapphire Crystal Glass
Crown Material: Stainless Steel
Strap Color: Black
Strap Material: Synthetic Fiber
Clasp Type: Pin Buckle
Clasp Material: Stainless Steel
Case Back: Solid Case Back
Weight: Not specified
Water Resistance: 300 Meters
Original Manufacturer: Blancpain
Movement Type: Automatic Mechanical Movement
Movement Diameter: 30.6 mm
Movement Thickness: 5.65 mm
Frequency: 28,800 vibrations per hour
Number of Jewels: 35
Total Components: 227
Power Reserve: 120 Hours
The sapphire crystal of this N Factory Fifty Fathoms is coated with a violet-blue anti-reflective film identical to the genuine watch. However, many watch enthusiasts misunderstand the function of crystal coatings. First of all, sapphire crystal itself is completely transparent rather than blue. The application of colored coatings follows each brand’s independent design philosophy, and the presence or absence of blue coating bears no relation to the overall quality of watch crystal.
For instance, Cartier watches rarely adopt blue anti-reflective coatings, while IWC has widely applied this coating in its recent products. The core principle of replica watch production is high fidelity to genuine pieces; coatings are only added if equipped on the original watch, otherwise they will be omitted entirely.
N Factory delivers outstanding craftsmanship on the dial surface. In particular, the luminous pigment on hour markers matches the luminous tone on hands perfectly. Inferior counterfeit Fifty Fathoms models always display noticeable color deviation between the luminescence of hands and dial indices.
Many customers wonder why this Fifty Fathoms replica carries a relatively high price tag, and high-grade luminous pigment accounts for a large portion of the production cost. The actual luminous performance of N Factory’s version is even better than what is shown in attached reference pictures. To achieve such strong luminous brightness, imported high-end luminous pigment is mandatory, and this premium luminescent material is priced by weight per gram. Moreover, the luminous layer applied by N Factory is evenly distributed across the dial, whereas small-scale manufacturers produce uneven luminescence with tiny dark speckles inside the luminous coating due to low-purity raw materials.
Pictured below is the titanium-cased variant finished in blue tone. Owing to the physical properties of titanium alloy, the metal surface presents a subdued, slightly greyish visual texture. At present, no low-grade replica versions are available for this blue titanium model on the market.
You can observe a steel stamp on the metal surface at the bottom right corner. For the rose gold variant, matching stamps are engraved on all four corners of the case back. Small manufacturers cut corners by omitting these stamped markings on the case back to reduce manufacturing costs.
Displayed in the next section is the rose gold edition. N Factory applies far thicker electroplated layers compared with generic small workshops, enabling the plating finish to retain its original color for roughly two years with only mild dullness over long-term wear. If you expect permanent colorfastness without fading, stainless steel or titanium case versions are more recommended options.
