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This is a generic case back crystal (exhibition back) for the IWC Portuguese Chronograph IW3714 series, measuring 27.0mm in diameter × 0.8mm in thickness, with a flat profile and a blue anti-reflective (AR) coating. A matching sealing gasket is included.
Made of sapphire or mineral glass (please verify), it offers good scratch resistance and optical clarity, serving as a direct substitute for a damaged or scratched original case back crystal. As an aftermarket part, it provides a cost-effective repair solution for watchmakers and enthusiasts.
Exhibition Back Design – Allows a clear view of the movement (e.g., Caliber 79350) and its finishing.
Blue AR Coating – Reduces glare and improves clarity when viewing the movement.
Includes Sealing Gasket – Matching gasket included for proper sealing during installation.
Generic Aftermarket – Non-original but precisely sized for the IW3714 case back opening.
Cost-Effective – Affordable alternative to genuine parts for repair or restoration.
| Parameter | Details |
|---|---|
| Compatible Model | IWC Portuguese Chronograph IW3714 series |
| Type | Generic aftermarket |
| Material | Sapphire or mineral glass (confirm with seller) |
| Shape | Flat |
| Diameter | 27.0 mm |
| Thickness | 0.8 mm |
| Coating | Blue anti-reflective (AR) |
| Included | Sealing gasket |
IWC Portuguese Chronograph IW3714 series (e.g., IW371446, IW371447)
Other IWC models using the same 27.0mm flat exhibition back (verify original size)
Replacement of damaged, deeply scratched, or aged original case back crystals
Replacement of aged gaskets during repair or restoration projects
1. Is this a genuine IWC case back crystal?
No. It is a generic aftermarket replacement, not original, but dimensionally matches the IW3714 and includes a gasket for direct replacement.
2. Is the material sapphire or mineral glass?
Not specified in the description. Please confirm with the seller before ordering. Sapphire is harder (Mohs 9) but more expensive; mineral glass is more affordable but less scratch-resistant.
3. What should I pay attention to during installation?
Clean the case back groove, place the new gasket, then the crystal. Tighten case back screws diagonally with even torque to avoid cracking. Professional installation is recommended.
4. Will the original water resistance be maintained?
The IW3714 is typically 30m water resistant. Proper installation with a new gasket can restore everyday splash resistance. A water resistance test is advised.
5. Is the crystal prone to scratches?
If sapphire, it is highly scratch-resistant for daily wear. If mineral glass, avoid contact with hard materials like sand. Good scratch resistance is provided, but not absolute.
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